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Mozilla » Firefox : Security Vulnerabilities (CVSS score between 4 and 4.99)

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# 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 2022-12-09
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 2022-12-09
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 2022-12-09
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 2022-12-09
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 2022-12-09
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 2021-12-08 2022-07-12
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-2021-43538 362 2021-12-08 2022-12-09
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.
8 CVE-2021-43536 668 2021-12-08 2022-12-09
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.
9 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.
10 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.
11 CVE-2021-38509 1021 2021-12-08 2022-12-09
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.
12 CVE-2021-38508 1021 2021-12-08 2022-12-09
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.
13 CVE-2021-38507 346 2021-12-08 2022-12-09
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.
14 CVE-2021-38506 1021 2021-12-08 2022-12-09
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.
15 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.
16 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.
17 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.
18 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.
19 CVE-2021-29965 610 2021-06-24 2021-06-30
4.3
None Remote Medium Not required None Partial None
A malicious website that causes an HTTP Authentication dialog to be spawned could trick the built-in password manager to suggest passwords for the currently active website instead of the website that triggered the dialog. *This bug only affects Firefox for Android. Other operating systems are unaffected.*. This vulnerability affects Firefox < 89.
20 CVE-2021-29963 345 2021-06-24 2021-07-01
4.3
None Remote Medium Not required None Partial None
Address bar search suggestions in private browsing mode were re-using session data from normal mode. *This bug only affects Firefox for Android. Other operating systems are unaffected.*. This vulnerability affects Firefox < 89.
21 CVE-2021-29962 404 2021-06-24 2021-06-25
4.3
None Remote Medium Not required None None Partial
Firefox for Android would become unstable and hard-to-recover when a website opened too many popups. *This bug only affects Firefox for Android. Other operating systems are unaffected.*. This vulnerability affects Firefox < 89.
22 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.
23 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.
24 CVE-2021-29959 863 2021-06-24 2022-07-12
4.3
None Remote Medium Not required None Partial None
When a user has already allowed a website to access microphone and camera, disabling camera sharing would not fully prevent the website from re-enabling it without an additional prompt. This was only possible if the website kept recording with the microphone until re-enabling the camera. This vulnerability affects Firefox < 89.
25 CVE-2021-29958 862 2021-06-24 2022-07-12
4.3
None Remote Medium Not required Partial None None
When a download was initiated, the client did not check whether it was in normal or private browsing mode, which led to private mode cookies being shared in normal browsing mode. This vulnerability affects Firefox for iOS < 34.
26 CVE-2021-29953 79 XSS 2021-06-24 2021-06-30
4.3
None Remote Medium Not required None Partial None
A malicious webpage could have forced a Firefox for Android user into executing attacker-controlled JavaScript in the context of another domain, resulting in a Universal Cross-Site Scripting vulnerability. *Note: This issue only affected Firefox for Android. Other operating systems are unaffected. Further details are being temporarily withheld to allow users an opportunity to update.*. This vulnerability affects Firefox < 88.0.1 and Firefox for Android < 88.1.3.
27 CVE-2021-29945 682 2021-06-24 2021-06-30
4.3
None Remote Medium Not required None None Partial
The WebAssembly JIT could miscalculate the size of a return type, which could lead to a null read and result in a crash. *Note: This issue only affected x86-32 platforms. Other platforms are unaffected.*. This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88.
28 CVE-2021-29944 79 Exec Code XSS 2021-06-24 2021-07-02
4.3
None Remote Medium Not required None Partial None
Lack of escaping allowed HTML injection when a webpage was viewed in Reader View. While a Content Security Policy prevents direct code execution, HTML injection is still possible. *Note: This issue only affected Firefox for Android. Other operating systems are unaffected.*. This vulnerability affects Firefox < 88.
29 CVE-2021-24001 668 2021-06-24 2021-07-02
4.3
None Remote Medium Not required None Partial None
A compromised content process could have performed session history manipulations it should not have been able to due to testing infrastructure that was not restricted to testing-only configurations. This vulnerability affects Firefox < 88.
30 CVE-2021-23998 345 2021-06-24 2021-07-02
4.3
None Remote Medium Not required None Partial None
Through complicated navigations with new windows, an HTTP page could have inherited a secure lock icon from an HTTPS page. This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88.
31 CVE-2021-23996 2021-06-24 2021-07-02
4.3
None Remote Medium Not required None Partial None
By utilizing 3D CSS in conjunction with Javascript, content could have been rendered outside the webpage's viewport, resulting in a spoofing attack that could have been used for phishing or other attacks on a user. This vulnerability affects Firefox < 88.
32 CVE-2021-23986 346 Bypass 2021-03-31 2021-08-06
4.3
None Remote Medium Not required Partial None None
A malicious extension with the 'search' permission could have installed a new search engine whose favicon referenced a cross-origin URL. The response to this cross-origin request could have been read by the extension, allowing a same-origin policy bypass by the extension, which should not have cross-origin permissions. This cross-origin request was made without cookies, so the sensitive information disclosed by the violation was limited to local-network resources or resources that perform IP-based authentication. This vulnerability affects Firefox < 87.
33 CVE-2021-23985 2021-03-31 2022-07-12
4.3
None Remote Medium Not required Partial None None
If an attacker is able to alter specific about:config values (for example malware running on the user's computer), the Devtools remote debugging feature could have been enabled in a way that was unnoticable to the user. This would have allowed a remote attacker (able to make a direct network connection to the victim) to monitor the user's browsing activity and (plaintext) network traffic. This was addressed by providing a visual cue when Devtools has an open network socket. This vulnerability affects Firefox < 87.
34 CVE-2021-23984 290 2021-03-31 2021-08-06
4.3
None Remote Medium Not required None Partial None
A malicious extension could have opened a popup window lacking an address bar. The title of the popup lacking an address bar should not be fully controllable, but in this situation was. This could have been used to spoof a website and attempt to trick the user into providing credentials. This vulnerability affects Firefox ESR < 78.9, Firefox < 87, and Thunderbird < 78.9.
35 CVE-2021-23983 787 Mem. Corr. 2021-03-31 2022-05-03
4.3
None Remote Medium Not required None None Partial
By causing a transition on a parent node by removing a CSS rule, an invalid property for a marker could have been applied, resulting in memory corruption and a potentially exploitable crash. This vulnerability affects Firefox < 87.
36 CVE-2021-23982 326 2021-03-31 2021-08-06
4.3
None Remote Medium Not required None Partial None
Using techniques that built on the slipstream research, a malicious webpage could have scanned both an internal network's hosts as well as services running on the user's local machine utilizing WebRTC connections. This vulnerability affects Firefox ESR < 78.9, Firefox < 87, and Thunderbird < 78.9.
37 CVE-2021-23975 862 2021-02-26 2022-05-27
4.3
None Remote Medium Not required None Partial None
The developer page about:memory has a Measure function for exploring what object types the browser has allocated and their sizes. When this function was invoked we incorrectly called the sizeof function, instead of using the API method that checks for invalid pointers. This vulnerability affects Firefox < 86.
38 CVE-2021-23974 XSS Bypass 2021-02-26 2022-05-23
4.3
None Remote Medium Not required None Partial None
The DOMParser API did not properly process '<noscript>' elements for escaping. This could be used as an mXSS vector to bypass an HTML Sanitizer. This vulnerability affects Firefox < 86.
39 CVE-2021-23973 209 2021-02-26 2022-05-27
4.3
None Remote Medium Not required Partial None None
When trying to load a cross-origin resource in an audio/video context a decoding error may have resulted, and the content of that error may have revealed information about the resource. This vulnerability affects Firefox < 86, Thunderbird < 78.8, and Firefox ESR < 78.8.
40 CVE-2021-23971 2021-02-26 2022-05-27
4.3
None Remote Medium Not required Partial None None
When processing a redirect with a conflicting Referrer-Policy, Firefox would have adopted the redirect's Referrer-Policy. This would have potentially resulted in more information than intended by the original origin being provided to the destination of the redirect. This vulnerability affects Firefox < 86.
41 CVE-2021-23970 617 2021-02-26 2022-05-27
4.3
None Remote Medium Not required None None Partial
Context-specific code was included in a shared jump table; resulting in assertions being triggered in multithreaded wasm code. This vulnerability affects Firefox < 86.
42 CVE-2021-23969 2021-02-26 2022-05-27
4.3
None Remote Medium Not required Partial None None
As specified in the W3C Content Security Policy draft, when creating a violation report, "User agents need to ensure that the source file is the URL requested by the page, pre-redirects. If that’s not possible, user agents need to strip the URL down to an origin to avoid unintentional leakage." Under certain types of redirects, Firefox incorrectly set the source file to be the destination of the redirects. This was fixed to be the redirect destination's origin. This vulnerability affects Firefox < 86, Thunderbird < 78.8, and Firefox ESR < 78.8.
43 CVE-2021-23968 209 +Info 2021-02-26 2022-05-27
4.3
None Remote Medium Not required Partial None None
If Content Security Policy blocked frame navigation, the full destination of a redirect served in the frame was reported in the violation report; as opposed to the original frame URI. This could be used to leak sensitive information contained in such URIs. This vulnerability affects Firefox < 86, Thunderbird < 78.8, and Firefox ESR < 78.8.
44 CVE-2021-23963 281 2021-02-26 2021-03-03
4.3
None Remote Medium Not required None Partial None
When sharing geolocation during an active WebRTC share, Firefox could have reset the webRTC sharing state in the user interface, leading to loss of control over the currently granted permission. This vulnerability affects Firefox < 85.
45 CVE-2021-23961 2021-02-26 2022-05-27
4.3
None Remote Medium Not required Partial None None
Further techniques that built on the slipstream research combined with a malicious webpage could have exposed both an internal network's hosts as well as services running on the user's local machine. This vulnerability affects Firefox < 85.
46 CVE-2021-23959 79 XSS 2021-02-26 2021-03-03
4.3
None Remote Medium Not required None Partial None
An XSS bug in internal error pages could have led to various spoofing attacks, including other error pages and the address bar. Note: This issue only affected Firefox for Android. Other operating systems are unaffected. This vulnerability affects Firefox < 85.
47 CVE-2021-23958 668 +Info 2021-02-26 2021-03-03
4.3
None Remote Medium Not required Partial None None
The browser could have been confused into transferring a screen sharing state into another tab, which would leak unintended information. This vulnerability affects Firefox < 85.
48 CVE-2021-23957 2021-02-26 2021-03-03
4.3
None Remote Medium Not required None Partial None
Navigations through the Android-specific `intent` URL scheme could have been misused to escape iframe sandbox. Note: This issue only affected Firefox for Android. Other operating systems are unaffected. This vulnerability affects Firefox < 85.
49 CVE-2021-23956 2021-02-26 2021-03-03
4.3
None Remote Medium Not required Partial None None
An ambiguous file picker design could have confused users who intended to select and upload a single file into uploading a whole directory. This was addressed by adding a new prompt. This vulnerability affects Firefox < 85.
50 CVE-2021-23955 1021 2021-02-26 2021-03-03
4.3
None Remote Medium Not required None Partial None
The browser could have been confused into transferring a pointer lock state into another tab, which could have lead to clickjacking attacks. This vulnerability affects Firefox < 85.
Total number of vulnerabilities : 440   Page : 1 (This Page)2 3 4 5 6 7 8 9
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