CVE-2020-6798: XSS
First published: Tue Feb 11 2020(Updated: )
If a <template> tag was used in a <select%gt; 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.
Credit: security@mozilla.org security@mozilla.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Mozilla Thunderbird | <68.5 | 68.5 |
| Mozilla Firefox ESR | <68.5 | 68.5 |
| Mozilla Firefox | <73 | 73 |
| Mozilla Firefox | <73.0 | |
| Mozilla Firefox ESR | <68.5.0 | |
| Mozilla Thunderbird | <68.5.0 | |
| debian/firefox | 133.0.3-1 | |
| debian/firefox-esr | 115.14.0esr-1~deb11u1 128.5.0esr-1~deb11u1 128.3.1esr-1~deb12u1 128.5.0esr-1~deb12u1 128.5.0esr-1 128.5.1esr-1 | |
| debian/thunderbird | 1:115.12.0-1~deb11u1 1:128.5.0esr-1~deb11u1 1:115.16.0esr-1~deb12u1 1:128.5.0esr-1~deb12u1 1:128.5.2esr-1 |
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Reference Links
- https://bugzilla.mozilla.org/show_bug.cgi?id=1602944
- https://www.mozilla.org/security/advisories/mfsa2020-05/
- https://www.mozilla.org/security/advisories/mfsa2020-06/
- https://www.mozilla.org/security/advisories/mfsa2020-07/
- https://security.gentoo.org/glsa/202003-02
- https://usn.ubuntu.com/4278-2/
- https://security.gentoo.org/glsa/202003-10
- https://usn.ubuntu.com/4328-1/
- https://usn.ubuntu.com/4335-1/
- https://launchpad.net/bugs/cve/CVE-2020-6798
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-07/
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-06/
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-05/
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-05/#CVE-2020-6798
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-06/#CVE-2020-6798
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-07/#CVE-2020-6798
- https://security-tracker.debian.org/tracker/CVE-2020-6798
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-6798
- https://nvd.nist.gov/vuln/detail/CVE-2020-6798
- https://ubuntu.com/security/CVE-2020-6798
Peer vulnerabilities
(Found alongside the following vulnerabilities)
Frequently Asked Questions
What is CVE-2020-6798?
CVE-2020-6798 is a vulnerability that allows JavaScript parsing and execution in a select tag when a template tag is used, resulting in a potential cross-site scripting vulnerability.
Which software is affected by CVE-2020-6798?
Mozilla Firefox ESR version 68.5, Mozilla Firefox up to version 73.0, Mozilla Thunderbird up to version 68.5, and certain versions of Ubuntu Firefox and Thunderbird packages are affected by CVE-2020-6798.
What is the severity of CVE-2020-6798?
The severity of CVE-2020-6798 is medium with a CVSS score of 6.1.
How can I fix CVE-2020-6798?
Update your Mozilla Firefox or Thunderbird to the latest version, or apply the recommended updates for the affected Ubuntu packages.
Where can I find more information about CVE-2020-6798?
You can find more information about CVE-2020-6798 on the Mozilla Bugzilla and Mozilla Security Advisories websites.
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