# |
CVE ID
|
CWE ID
|
# of Exploits
|
Vulnerability Type(s)
|
Publish Date
|
Update Date
|
Score
|
Gained Access Level
|
Access
|
Complexity
|
Authentication
|
Conf.
|
Integ.
|
Avail.
|
1 |
CVE-2021-43546 |
1021 |
|
|
2021-12-08 |
2022-03-16 |
4.3 |
None |
Remote |
Medium |
Not required |
None |
Partial |
None |
It was possible to recreate previous cursor spoofing attacks against users with a zoomed native cursor. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95. |
2 |
CVE-2021-43545 |
834 |
|
|
2021-12-08 |
2022-02-28 |
4.3 |
None |
Remote |
Medium |
Not required |
None |
None |
Partial |
Using the Location API in a loop could have caused severe application hangs and crashes. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95. |
3 |
CVE-2021-43543 |
79 |
|
XSS |
2021-12-08 |
2022-03-16 |
4.3 |
None |
Remote |
Medium |
Not required |
None |
Partial |
None |
Documents loaded with the CSP sandbox directive could have escaped the sandbox's script restriction by embedding additional content. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95. |
4 |
CVE-2021-43542 |
209 |
|
|
2021-12-08 |
2022-03-16 |
4.3 |
None |
Remote |
Medium |
Not required |
Partial |
None |
None |
Using XMLHttpRequest, an attacker could have identified installed applications by probing error messages for loading external protocols. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95. |
5 |
CVE-2021-43541 |
|
|
|
2021-12-08 |
2022-03-16 |
4.3 |
None |
Remote |
Medium |
Not required |
None |
Partial |
None |
When invoking protocol handlers for external protocols, a supplied parameter URL containing spaces was not properly escaped. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95. |
6 |
CVE-2021-43540 |
732 |
|
|
2021-12-08 |
2022-03-16 |
4.3 |
None |
Remote |
Medium |
Not required |
None |
Partial |
None |
WebExtensions with the correct permissions were able to create and install ServiceWorkers for third-party websites that would not have been uninstalled with the extension. This vulnerability affects Firefox < 95. |
7 |
CVE-2021-43539 |
416 |
|
|
2021-12-08 |
2022-03-16 |
6.8 |
None |
Remote |
Medium |
Not required |
Partial |
Partial |
Partial |
Failure to correctly record the location of live pointers across wasm instance calls resulted in a GC occurring within the call not tracing those live pointers. This could have led to a use-after-free causing a potentially exploitable crash. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95. |
8 |
CVE-2021-43538 |
362 |
|
|
2021-12-08 |
2022-03-16 |
4.3 |
None |
Remote |
Medium |
Not required |
None |
Partial |
None |
By misusing a race in our notification code, an attacker could have forcefully hidden the notification for pages that had received full screen and pointer lock access, which could have been used for spoofing attacks. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95. |
9 |
CVE-2021-43537 |
704 |
|
|
2021-12-08 |
2022-03-16 |
6.8 |
None |
Remote |
Medium |
Not required |
Partial |
Partial |
Partial |
An incorrect type conversion of sizes from 64bit to 32bit integers allowed an attacker to corrupt memory leading to a potentially exploitable crash. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95. |
10 |
CVE-2021-43536 |
668 |
|
|
2021-12-08 |
2022-03-16 |
4.3 |
None |
Remote |
Medium |
Not required |
Partial |
None |
None |
Under certain circumstances, asynchronous functions could have caused a navigation to fail but expose the target URL. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95. |
11 |
CVE-2021-43535 |
416 |
|
Mem. Corr. |
2021-12-08 |
2022-03-17 |
6.8 |
None |
Remote |
Medium |
Not required |
Partial |
Partial |
Partial |
A use-after-free could have occured when an HTTP2 session object was released on a different thread, leading to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox < 93, Thunderbird < 91.3, and Firefox ESR < 91.3. |
12 |
CVE-2021-43534 |
787 |
|
Mem. Corr. |
2021-12-08 |
2022-03-17 |
6.8 |
None |
Remote |
Medium |
Not required |
Partial |
Partial |
Partial |
Mozilla developers and community members reported memory safety bugs present in Firefox 93 and Firefox ESR 91.2. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3. |
13 |
CVE-2021-43533 |
|
|
|
2021-12-08 |
2021-12-10 |
4.3 |
None |
Remote |
Medium |
Not required |
None |
Partial |
None |
When parsing internationalized domain names, high bits of the characters in the URLs were sometimes stripped, resulting in inconsistencies that could lead to user confusion or attacks such as phishing. This vulnerability affects Firefox < 94. |
14 |
CVE-2021-43532 |
601 |
|
|
2021-12-08 |
2021-12-10 |
5.8 |
None |
Remote |
Medium |
Not required |
Partial |
Partial |
None |
The 'Copy Image Link' context menu action would copy the final image URL after redirects. By embedding an image that triggered authentication flows - in conjunction with a Content Security Policy that stopped a redirection chain in the middle - the final image URL could be one that contained an authentication token used to takeover a user account. If a website tricked a user into copy and pasting the image link back to the page, the page would be able to steal the authentication tokens. This was fixed by making the action return the original URL, before any redirects. This vulnerability affects Firefox < 94. |
15 |
CVE-2021-43531 |
346 |
|
|
2021-12-08 |
2021-12-10 |
4.3 |
None |
Remote |
Medium |
Not required |
Partial |
None |
None |
When a user loaded a Web Extensions context menu, the Web Extension could access the post-redirect URL of the element clicked. If the Web Extension lacked the WebRequest permission for the hosts involved in the redirect, this would be a same-origin-violation leaking data the Web Extension should have access to. This was fixed to provide the pre-redirect URL. This is related to CVE-2021-43532 but in the context of Web Extensions. This vulnerability affects Firefox < 94. |
16 |
CVE-2021-38509 |
1021 |
|
|
2021-12-08 |
2022-03-16 |
4.3 |
None |
Remote |
Medium |
Not required |
None |
Partial |
None |
Due to an unusual sequence of attacker-controlled events, a Javascript alert() dialog with arbitrary (although unstyled) contents could be displayed over top an uncontrolled webpage of the attacker's choosing. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3. |
17 |
CVE-2021-38508 |
1021 |
|
|
2021-12-08 |
2022-03-16 |
4.3 |
None |
Remote |
Medium |
Not required |
None |
Partial |
None |
By displaying a form validity message in the correct location at the same time as a permission prompt (such as for geolocation), the validity message could have obscured the prompt, resulting in the user potentially being tricked into granting the permission. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3. |
18 |
CVE-2021-38507 |
346 |
|
|
2021-12-08 |
2022-03-16 |
4.3 |
None |
Remote |
Medium |
Not required |
None |
Partial |
None |
The Opportunistic Encryption feature of HTTP2 (RFC 8164) allows a connection to be transparently upgraded to TLS while retaining the visual properties of an HTTP connection, including being same-origin with unencrypted connections on port 80. However, if a second encrypted port on the same IP address (e.g. port 8443) did not opt-in to opportunistic encryption; a network attacker could forward a connection from the browser to port 443 to port 8443, causing the browser to treat the content of port 8443 as same-origin with HTTP. This was resolved by disabling the Opportunistic Encryption feature, which had low usage. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3. |
19 |
CVE-2021-38506 |
1021 |
|
|
2021-12-08 |
2022-02-28 |
4.3 |
None |
Remote |
Medium |
Not required |
None |
Partial |
None |
Through a series of navigations, Firefox could have entered fullscreen mode without notification or warning to the user. This could lead to spoofing attacks on the browser UI including phishing. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3. |
20 |
CVE-2021-38504 |
416 |
|
Mem. Corr. |
2021-12-08 |
2022-03-16 |
6.8 |
None |
Remote |
Medium |
Not required |
Partial |
Partial |
Partial |
When interacting with an HTML input element's file picker dialog with webkitdirectory set, a use-after-free could have resulted, leading to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3. |
21 |
CVE-2021-38503 |
863 |
|
Bypass |
2021-12-08 |
2022-03-16 |
7.5 |
None |
Remote |
Low |
Not required |
Partial |
Partial |
Partial |
The iframe sandbox rules were not correctly applied to XSLT stylesheets, allowing an iframe to bypass restrictions such as executing scripts or navigating the top-level frame. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3. |
22 |
CVE-2021-38501 |
|
|
Mem. Corr. |
2021-11-03 |
2021-11-04 |
6.8 |
None |
Remote |
Medium |
Not required |
Partial |
Partial |
Partial |
Mozilla developers reported memory safety bugs present in Firefox 92 and Firefox ESR 91.1. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 93, Thunderbird < 91.2, and Firefox ESR < 91.2. |
23 |
CVE-2021-38500 |
|
|
Mem. Corr. |
2021-11-03 |
2022-03-17 |
6.8 |
None |
Remote |
Medium |
Not required |
Partial |
Partial |
Partial |
Mozilla developers reported memory safety bugs present in Firefox 92 and Firefox ESR 91.1. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Thunderbird < 78.15, Thunderbird < 91.2, Firefox ESR < 91.2, Firefox ESR < 78.15, and Firefox < 93. |
24 |
CVE-2021-38499 |
787 |
|
Mem. Corr. |
2021-11-03 |
2022-05-03 |
6.8 |
None |
Remote |
Medium |
Not required |
Partial |
Partial |
Partial |
Mozilla developers reported memory safety bugs present in Firefox 92. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 93. |
25 |
CVE-2021-38498 |
416 |
|
Mem. Corr. |
2021-11-03 |
2021-11-04 |
5.0 |
None |
Remote |
Low |
Not required |
None |
None |
Partial |
During process shutdown, a document could have caused a use-after-free of a languages service object, leading to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox < 93, Thunderbird < 91.2, and Firefox ESR < 91.2. |
26 |
CVE-2021-38497 |
346 |
|
|
2021-11-03 |
2021-11-04 |
4.3 |
None |
Remote |
Medium |
Not required |
None |
Partial |
None |
Through use of reportValidity() and window.open(), a plain-text validation message could have been overlaid on another origin, leading to possible user confusion and spoofing attacks. This vulnerability affects Firefox < 93, Thunderbird < 91.2, and Firefox ESR < 91.2. |
27 |
CVE-2021-38496 |
416 |
|
Mem. Corr. |
2021-11-03 |
2022-03-17 |
6.8 |
None |
Remote |
Medium |
Not required |
Partial |
Partial |
Partial |
During operations on MessageTasks, a task may have been removed while it was still scheduled, resulting in memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 78.15, Thunderbird < 91.2, Firefox ESR < 91.2, Firefox ESR < 78.15, and Firefox < 93. |
28 |
CVE-2021-38494 |
787 |
|
Mem. Corr. |
2021-11-03 |
2022-05-03 |
6.8 |
None |
Remote |
Medium |
Not required |
Partial |
Partial |
Partial |
Mozilla developers reported memory safety bugs present in Firefox 91. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 92. |
29 |
CVE-2021-38493 |
787 |
|
Mem. Corr. |
2021-11-03 |
2022-05-03 |
6.8 |
None |
Remote |
Medium |
Not required |
Partial |
Partial |
Partial |
Mozilla developers reported memory safety bugs present in Firefox 91 and Firefox ESR 78.13. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 78.14, Thunderbird < 78.14, and Firefox < 92. |
30 |
CVE-2021-38491 |
|
|
|
2021-11-03 |
2022-03-16 |
4.3 |
None |
Remote |
Medium |
Not required |
None |
Partial |
None |
Mixed-content checks were unable to analyze opaque origins which led to some mixed content being loaded. This vulnerability affects Firefox < 92. |
31 |
CVE-2021-30547 |
787 |
|
|
2021-06-15 |
2022-02-28 |
6.8 |
None |
Remote |
Medium |
Not required |
Partial |
Partial |
Partial |
Out of bounds write in ANGLE in Google Chrome prior to 91.0.4472.101 allowed a remote attacker to potentially perform out of bounds memory access via a crafted HTML page. |
32 |
CVE-2021-29991 |
444 |
|
|
2021-11-03 |
2021-11-04 |
5.8 |
None |
Remote |
Medium |
Not required |
Partial |
Partial |
None |
Firefox incorrectly accepted a newline in a HTTP/3 header, interpretting it as two separate headers. This allowed for a header splitting attack against servers using HTTP/3. This vulnerability affects Firefox < 91.0.1 and Thunderbird < 91.0.1. |
33 |
CVE-2021-29990 |
787 |
|
Mem. Corr. |
2021-08-17 |
2022-05-03 |
6.8 |
None |
Remote |
Medium |
Not required |
Partial |
Partial |
Partial |
Mozilla developers and community members reported memory safety bugs present in Firefox 90. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 91. |
34 |
CVE-2021-29989 |
787 |
|
Mem. Corr. |
2021-08-17 |
2022-05-03 |
6.8 |
None |
Remote |
Medium |
Not required |
Partial |
Partial |
Partial |
Mozilla developers reported memory safety bugs present in Firefox 90 and Firefox ESR 78.12. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Thunderbird < 78.13, Firefox ESR < 78.13, and Firefox < 91. |
35 |
CVE-2021-29988 |
125 |
|
Mem. Corr. |
2021-08-17 |
2022-04-25 |
6.8 |
None |
Remote |
Medium |
Not required |
Partial |
Partial |
Partial |
Firefox incorrectly treated an inline list-item element as a block element, resulting in an out of bounds read or memory corruption, and a potentially exploitable crash. This vulnerability affects Thunderbird < 78.13, Thunderbird < 91, Firefox ESR < 78.13, and Firefox < 91. |
36 |
CVE-2021-29985 |
416 |
|
Mem. Corr. |
2021-08-17 |
2022-03-16 |
6.8 |
None |
Remote |
Medium |
Not required |
Partial |
Partial |
Partial |
A use-after-free vulnerability in media channels could have led to memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 78.13, Thunderbird < 91, Firefox ESR < 78.13, and Firefox < 91. |
37 |
CVE-2021-29984 |
787 |
|
Mem. Corr. |
2021-08-17 |
2022-05-03 |
6.8 |
None |
Remote |
Medium |
Not required |
Partial |
Partial |
Partial |
Instruction reordering resulted in a sequence of instructions that would cause an object to be incorrectly considered during garbage collection. This led to memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 78.13, Thunderbird < 91, Firefox ESR < 78.13, and Firefox < 91. |
38 |
CVE-2021-29982 |
772 |
|
|
2021-08-17 |
2022-03-16 |
4.3 |
None |
Remote |
Medium |
Not required |
Partial |
None |
None |
Due to incorrect JIT optimization, we incorrectly interpreted data from the wrong type of object, resulting in the potential leak of a single bit of memory. This vulnerability affects Firefox < 91 and Thunderbird < 91. |
39 |
CVE-2021-29981 |
|
|
|
2021-08-17 |
2022-03-16 |
6.8 |
None |
Remote |
Medium |
Not required |
Partial |
Partial |
Partial |
An issue present in lowering/register allocation could have led to obscure but deterministic register confusion failures in JITted code that would lead to a potentially exploitable crash. This vulnerability affects Firefox < 91 and Thunderbird < 91. |
40 |
CVE-2021-29980 |
909 |
|
Mem. Corr. |
2021-08-17 |
2022-03-16 |
6.8 |
None |
Remote |
Medium |
Not required |
Partial |
Partial |
Partial |
Uninitialized memory in a canvas object could have caused an incorrect free() leading to memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 78.13, Thunderbird < 91, Firefox ESR < 78.13, and Firefox < 91. |
41 |
CVE-2021-29977 |
787 |
|
Mem. Corr. |
2021-08-05 |
2022-03-16 |
6.8 |
None |
Remote |
Medium |
Not required |
Partial |
Partial |
Partial |
Mozilla developers reported memory safety bugs present in Firefox 89. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 90. |
42 |
CVE-2021-29976 |
787 |
|
Mem. Corr. |
2021-08-05 |
2022-03-16 |
6.8 |
None |
Remote |
Medium |
Not required |
Partial |
Partial |
Partial |
Mozilla developers reported memory safety bugs present in code shared between Firefox and Thunderbird. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Thunderbird < 78.12, Firefox ESR < 78.12, and Firefox < 90. |
43 |
CVE-2021-29975 |
|
|
|
2021-08-05 |
2022-03-16 |
4.3 |
None |
Remote |
Medium |
Not required |
None |
Partial |
None |
Through a series of DOM manipulations, a message, over which the attacker had control of the text but not HTML or formatting, could be overlaid on top of another domain (with the new domain correctly shown in the address bar) resulting in possible user confusion. This vulnerability affects Firefox < 90. |
44 |
CVE-2021-29974 |
|
|
|
2021-08-05 |
2022-03-16 |
2.6 |
None |
Remote |
High |
Not required |
None |
Partial |
None |
When network partitioning was enabled, e.g. as a result of Enhanced Tracking Protection settings, a TLS error page would allow the user to override an error on a domain which had specified HTTP Strict Transport Security (which implies that the error should not be override-able.) This issue did not affect the network connections, and they were correctly upgraded to HTTPS automatically. This vulnerability affects Firefox < 90. |
45 |
CVE-2021-29972 |
416 |
|
|
2021-08-05 |
2022-03-25 |
6.8 |
None |
Remote |
Medium |
Not required |
Partial |
Partial |
Partial |
A use-after-free vulnerability was found via testing, and traced to an out-of-date Cairo library. Updating the library resolved the issue, and may have remediated other, unknown security vulnerabilities as well. This vulnerability affects Firefox < 90. |
46 |
CVE-2021-29970 |
787 |
|
Mem. Corr. |
2021-08-05 |
2022-04-25 |
5.1 |
None |
Remote |
High |
Not required |
Partial |
Partial |
Partial |
A malicious webpage could have triggered a use-after-free, memory corruption, and a potentially exploitable crash. *This bug could only be triggered when accessibility was enabled.*. This vulnerability affects Thunderbird < 78.12, Firefox ESR < 78.12, and Firefox < 90. |
47 |
CVE-2021-29967 |
787 |
|
Mem. Corr. |
2021-06-24 |
2022-05-03 |
6.8 |
None |
Remote |
Medium |
Not required |
Partial |
Partial |
Partial |
Mozilla developers reported memory safety bugs present in Firefox 88 and Firefox ESR 78.11. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Thunderbird < 78.11, Firefox < 89, and Firefox ESR < 78.11. |
48 |
CVE-2021-29966 |
787 |
|
Mem. Corr. |
2021-06-24 |
2022-05-03 |
6.8 |
None |
Remote |
Medium |
Not required |
Partial |
Partial |
Partial |
Mozilla developers reported memory safety bugs present in Firefox 88. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 89. |
49 |
CVE-2021-29961 |
863 |
|
|
2021-06-24 |
2021-09-20 |
4.3 |
None |
Remote |
Medium |
Not required |
None |
Partial |
None |
When styling and rendering an oversized `<select>` element, Firefox did not apply correct clipping which allowed an attacker to paint over the user interface. This vulnerability affects Firefox < 89. |
50 |
CVE-2021-29960 |
669 |
|
|
2021-06-24 |
2021-09-20 |
4.3 |
None |
Remote |
Medium |
Not required |
Partial |
None |
None |
Firefox used to cache the last filename used for printing a file. When generating a filename for printing, Firefox usually suggests the web page title. The caching and suggestion techniques combined may have lead to the title of a website visited during private browsing mode being stored on disk. This vulnerability affects Firefox < 89. |