CVEvulnerability
CVE-2021-29961
4.3 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2021-06-24
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 4.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
- CVSS 2.0 ([email protected])
- 4.3 MEDIUM — AV:N/AC:M/Au:N/C:N/I:P/A:N
- Weaknesses
- CWE-863
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.
Affected configurations
• mozilla firefox (>= 78.11.0 < 89.0)
Related
Weakness · CWE (1)
- CWE-863 Incorrect Authorization weakness
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1700235 Broken Link, Issue Tracking, Vendor Advisory
- https://security.gentoo.org/glsa/202107-09 Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-23/ Release Notes, Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1700235 Broken Link, Issue Tracking, Vendor Advisory
- https://security.gentoo.org/glsa/202107-09 Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-23/ Release Notes, Vendor Advisory