Vulnerability Details CVE-2021-23976
When accepting a malicious intent from other installed apps, Firefox for Android accepted manifests from arbitrary file paths and allowed declaring webapp manifests for other origins. This could be used to gain fullscreen access for UI spoofing and could also lead to cross-origin attacks on targeted websites. Note: This issue is a different issue from CVE-2020-26954 and only affected Firefox for Android. Other operating systems are unaffected. This vulnerability affects Firefox < 86.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 55.6%
CVSS Severity
CVSS v3 Score 8.1
CVSS v2 Score 5.8
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1684627
- https://security.gentoo.org/glsa/202104-10
- https://www.mozilla.org/security/advisories/mfsa2021-07/
- https://bugzilla.mozilla.org/show_bug.cgi?id=1684627
- https://security.gentoo.org/glsa/202104-10
- https://www.mozilla.org/security/advisories/mfsa2021-07/