How severe is CVE-2025-3032?

CVE-2025-3032 has a CVSS 3.x base score of 7.4, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2025-3032 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-3032?

CVE-2025-3032 primarily affects Mozilla Firefox. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-3032?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-3032 have an EU (EUVD) identifier?

Yes. CVE-2025-3032 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-9298.

When was CVE-2025-3032 published?

CVE-2025-3032 was published on 2025-04-01 and last updated on 2026-06-17.

CVE-2025-3032

CVE-2025-3032 is a high-severity vulnerability in Mozilla Firefox with a CVSS 3.x base score of 7.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-403.

Key facts

Severity: High (CVSS 3.x base score 7.4)
EPSS exploit prediction: 0% (29th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-9298
Weakness: CWE-403
Affected product: Mozilla Firefox
Published: 2025-04-01
Last modified: 2026-06-17

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.

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.
How severe is CVE-2025-3032?: CVE-2025-3032 has a CVSS 3.x base score of 7.4, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2025-3032 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-3032?: CVE-2025-3032 primarily affects Mozilla Firefox. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-3032?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-3032 have an EU (EUVD) identifier?: Yes. CVE-2025-3032 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-9298.
When was CVE-2025-3032 published?: CVE-2025-3032 was published on 2025-04-01 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*

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