VulnerabilityModified
CVE-2021-29971
This vulnerability affects Firefox < 90.
CRITICAL 9.8EPSS 1.02%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.02%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
If a user had granted a permission to a webpage and saved that grant, any webpage running on the same host - irrespective of scheme or port - would be granted that permission. *This bug only affects Firefox for Android. Other operating systems are unaffected.*. This vulnerability affects Firefox < 90.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 1.02% probability · 62th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-281
- Affected
- mozilla/firefox
- Source
- security@mozilla.org
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1713638Issue Tracking, Permissions Required
- https://www.mozilla.org/security/advisories/mfsa2021-28/Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1713638Issue Tracking, Permissions Required
- https://www.mozilla.org/security/advisories/mfsa2021-28/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.