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

EPSS: 0.002 (4.9th percentile) — read the EPSS interpretation.

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.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

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.