Information disclosure in Mozilla Firefox
CVE-2025-10536
Information disclosure in the Networking: Cache component. This vulnerability was fixed in Firefox 143, Firefox ESR 140.3, Thunderbird 143, and Thunderbird 140.3.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.2 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.002 (5.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 5th percentile — 5.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Mozilla Firefox — versions 140.3, 143
- Mozilla Thunderbird — versions 140.3, 143
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugzilla.mozilla.org/show_bug.cgi (Permissions Required, Issue Tracking)
- www.mozilla.org/security/advisories/mfsa2025-73/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2025-75/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2025-77/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2025-78/ (Vendor Advisory)
- af854a3a-2127-422b-91ae-364da2661108
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2025-10536?
- CVE-2025-10536 is a medium-severity vulnerability in Mozilla Firefox, classified under Information Disclosure. CVSS score: 6.2/10. Published 2025-09-16.
- How severe is CVE-2025-10536?
- Medium severity. CVSS v3 base score is 6.2 out of 10.
- Is CVE-2025-10536 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.