CVE-2025-3032

moderate-risk

Published 2025-04-01

Leaking of file descriptors from the fork server to web content processes could allow for privilege escalation attacks. This vulnerability was fixed in Firefox 137 and Thunderbird 137.

Do I need to act?

0.24% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 7.4/10 High

NETWORK / HIGH complexity

Affected Products (2)

Firefox

Thunderbird

Affected Vendors

Mozilla

References (3)

Issue Tracking https://bugzilla.mozilla.org/show_bug.cgi?id=1949987

Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2025-20/

Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2025-23/

/ 100

moderate-risk

Severity 22/34 · High

Exploitability 1/34 · Minimal

Exposure 7/34 · Low