Vulnerability in Mozilla Firefox
CVE-2022-34477
The MediaError message property should be consistent to avoid leaking information about cross-origin resources; however for a same-site cross-origin resource, the message could have leaked information enabling XS-Leaks attacks. This vulnerability affects Firefox < 102.
EPSS: 0.006 (42.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Mozilla Firefox — versions unspecified
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@mozilla.org (Vendor Advisory)
- security@mozilla.org (Permissions Required, Issue Tracking, Vendor Advisory)
Frequently asked questions
- What is CVE-2022-34477?
- CVE-2022-34477 is a high-severity vulnerability in Mozilla Firefox, classified under Observable Discrepancy. CVSS score: 7.5/10. Published 2022-12-22.
- How severe is CVE-2022-34477?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2022-34477 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.