VULNERABILITY INTELLIGENCE

CVE-2021-29987

CVSS score6.5 MEDIUM
EPSS probability0.95%
CISA KEVNot currently listed
Published2021-08-17
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Description

After requesting multiple permissions, and closing the first permission panel, subsequent permission panels will be displayed in a different position but still record a click in the default location, making it possible to trick a user into accepting a permission they did not want to. *This bug only affects Firefox on Linux. Other operating systems are unaffected.*. This vulnerability affects Firefox < 91 and Thunderbird < 91.

Weakness classification

  • nvd@nist.gov: CWE-307

Primary references