Vulnerability Description
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.
CVSS Score
4.3
MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | >= 78.11.0, < 89.0 |
Related Weaknesses (CWE)
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1700235Broken LinkIssue TrackingVendor Advisory
- https://security.gentoo.org/glsa/202107-09Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-23/Release NotesVendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1700235Broken LinkIssue TrackingVendor Advisory
- https://security.gentoo.org/glsa/202107-09Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-23/Release NotesVendor Advisory
FAQ
What is CVE-2021-29961?
CVE-2021-29961 is a vulnerability with a CVSS score of 4.3 (MEDIUM). 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.
How severe is CVE-2021-29961?
CVE-2021-29961 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-29961?
Check the references section above for vendor advisories and patch information. Affected products include: Mozilla Firefox.