CVE-2025-3032

HIGH

Published Apr 1, 2025 Modified Apr 13, 2026 CWE-403

Description

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.

CVSS v3.1 Score

7.4

HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Weakness Type (CWE)

CWE-403 CWE-403

Affected Products

Vendor	Product	Versions
mozilla	firefox	< 137.0
mozilla	thunderbird	< 137.0

References

Advisories & Patches

https://www.mozilla.org/security/advisories/mfsa2025-20/ https://www.mozilla.org/security/advisories/mfsa2025-23/

Other References

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

Frequently Asked Questions

What is CVE-2025-3032? +

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. It has a CVSS v3.1 base score of 7.4 (HIGH).

How severe is CVE-2025-3032? +

CVE-2025-3032 has a CVSS v3.1 score of 7.4 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-3032? +

CVE-2025-3032 affects products from mozilla, specifically: firefox, thunderbird. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-3032? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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