CVE-2025-1009
moderate-risk
Published 2025-02-04
An attacker could have caused a use-after-free via crafted XSLT data, leading to a potentially exploitable crash. This vulnerability was fixed in Firefox 135, Firefox ESR 115.20, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135.
Do I need to act?
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0.82% 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
9
CVSS 9.8/10
Critical
NETWORK
/ LOW complexity
Affected Products (4)
Affected Vendors
References (8)
Permissions Required
https://bugzilla.mozilla.org/show_bug.cgi?id=1936613
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-07/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-08/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-09/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-10/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-11/
45
/ 100
moderate-risk
Severity
32/34 · Critical
Exploitability
3/34 · Minimal
Exposure
10/34 · Low