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Mozilla » Firefox Esr : Security Vulnerabilities Published In 2020 (Cross Site Scripting (XSS))
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CVE ID
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CWE ID
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# of Exploits
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Vulnerability Type(s)
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Publish Date
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Update Date
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Score
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Gained Access Level
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Access
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Complexity
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Authentication
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Conf.
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Integ.
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Avail.
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1 |
CVE-2020-26958 |
79 |
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XSS Bypass |
2020-12-09 |
2020-12-10 |
4.3 |
None |
Remote |
Medium |
Not required |
None |
Partial |
None |
Firefox did not block execution of scripts with incorrect MIME types when the response was intercepted and cached through a ServiceWorker. This could lead to a cross-site script inclusion vulnerability, or a Content Security Policy bypass. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5. |
2 |
CVE-2020-26956 |
79 |
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XSS |
2020-12-09 |
2020-12-10 |
4.3 |
None |
Remote |
Medium |
Not required |
None |
Partial |
None |
In some cases, removing HTML elements during sanitization would keep existing SVG event handlers and therefore lead to XSS. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5. |
3 |
CVE-2020-26951 |
79 |
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XSS Bypass |
2020-12-09 |
2020-12-09 |
4.3 |
None |
Remote |
Medium |
Not required |
None |
Partial |
None |
A parsing and event loading mismatch in Firefox's SVG code could have allowed load events to fire, even after sanitization. An attacker already capable of exploiting an XSS vulnerability in privileged internal pages could have used this attack to bypass our built-in sanitizer. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5. |
4 |
CVE-2020-15676 |
79 |
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XSS |
2020-10-01 |
2020-11-02 |
4.3 |
None |
Remote |
Medium |
Not required |
None |
Partial |
None |
Firefox sometimes ran the onload handler for SVG elements that the DOM sanitizer decided to remove, resulting in JavaScript being executed after pasting attacker-controlled data into a contenteditable element. This vulnerability affects Firefox < 81, Thunderbird < 78.3, and Firefox ESR < 78.3. |
5 |
CVE-2020-6798 |
79 |
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XSS |
2020-03-02 |
2020-03-12 |
4.3 |
None |
Remote |
Medium |
Not required |
None |
Partial |
None |
If a template tag was used in a select tag, the parser could be confused and allow JavaScript parsing and execution when it should not be allowed. A site that relied on the browser behaving correctly could suffer a cross-site scripting vulnerability as a result. In general, this flaw cannot be exploited through email in the Thunderbird product because scripting is disabled when reading mail, but is potentially a risk in browser or browser-like contexts. This vulnerability affects Thunderbird < 68.5, Firefox < 73, and Firefox < ESR68.5. |
6 |
CVE-2019-17022 |
79 |
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XSS |
2020-01-08 |
2020-01-13 |
4.3 |
None |
Remote |
Medium |
Not required |
None |
Partial |
None |
When pasting a <style> tag from the clipboard into a rich text editor, the CSS sanitizer does not escape < and > characters. Because the resulting string is pasted directly into the text node of the element this does not result in a direct injection into the webpage; however, if a webpage subsequently copies the node's innerHTML, assigning it to another innerHTML, this would result in an XSS vulnerability. Two WYSIWYG editors were identified with this behavior, more may exist. This vulnerability affects Firefox ESR < 68.4 and Firefox < 72. |
7 |
CVE-2019-17016 |
79 |
|
XSS |
2020-01-08 |
2020-01-13 |
4.3 |
None |
Remote |
Medium |
Not required |
None |
Partial |
None |
When pasting a <style> tag from the clipboard into a rich text editor, the CSS sanitizer incorrectly rewrites a @namespace rule. This could allow for injection into certain types of websites resulting in data exfiltration. This vulnerability affects Firefox ESR < 68.4 and Firefox < 72. |
8 |
CVE-2019-11763 |
79 |
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XSS |
2020-01-08 |
2020-03-14 |
4.3 |
None |
Remote |
Medium |
Not required |
None |
Partial |
None |
Failure to correctly handle null bytes when processing HTML entities resulted in Firefox incorrectly parsing these entities. This could have led to HTML comment text being treated as HTML which could have led to XSS in a web application under certain conditions. It could have also led to HTML entities being masked from filters - enabling the use of entities to mask the actual characters of interest from filters. This vulnerability affects Firefox < 70, Thunderbird < 68.2, and Firefox ESR < 68.2. |
Total number of vulnerabilities : 8
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