CVE-2021-29961

medium

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.

References

https://www.mozilla.org/security/advisories/mfsa2021-23/

https://bugzilla.mozilla.org/show_bug.cgi?id=1700235

https://security.gentoo.org/glsa/202107-09

Details

Source: MITRE

Published: 2021-06-24

Updated: 2021-09-20

Type: CWE-863

Risk Information

CVSS v2

Base Score: 4.3

Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N

Impact Score: 2.9

Exploitability Score: 8.6

Severity: MEDIUM

CVSS v3

Base Score: 4.3

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Impact Score: 1.4

Exploitability Score: 2.8

Severity: MEDIUM