Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | < 81.0 |
| Mozilla | Firefox Esr | < 78.3 |
| Mozilla | Thunderbird | < 78.3 |
| Debian | Debian Linux | 9.0 |
| Opensuse | Leap | 15.1 |
Related Weaknesses (CWE)
References
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00074.htmlBroken LinkMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00077.htmlBroken LinkMailing ListThird Party Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1646140Issue TrackingPermissions RequiredVendor Advisory
- https://lists.debian.org/debian-lts-announce/2020/10/msg00020.htmlMailing ListThird Party Advisory
- https://security.gentoo.org/glsa/202010-02Third Party Advisory
- https://www.debian.org/security/2020/dsa-4770Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-42/Release NotesVendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-43/Release NotesVendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-44/Release NotesVendor Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00074.htmlBroken LinkMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00077.htmlBroken LinkMailing ListThird Party Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1646140Issue TrackingPermissions RequiredVendor Advisory
- https://lists.debian.org/debian-lts-announce/2020/10/msg00020.htmlMailing ListThird Party Advisory
- https://security.gentoo.org/glsa/202010-02Third Party Advisory
- https://www.debian.org/security/2020/dsa-4770Third Party Advisory
FAQ
What is CVE-2020-15676?
CVE-2020-15676 is a vulnerability with a CVSS score of 6.1 (MEDIUM). 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...
How severe is CVE-2020-15676?
CVE-2020-15676 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-15676?
Check the references section above for vendor advisories and patch information. Affected products include: Mozilla Firefox, Mozilla Firefox Esr, Mozilla Thunderbird, Debian Debian Linux, Opensuse Leap.