Critical severity · published Feb 4, 2025
CVE-2025-1009
An attacker could have caused a use-after-free via crafted XSLT data, leading to a potentially exploitable crash
9.8
CVSS
1.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.2% · higher than 68% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FI
Firefox · Mozilla
before 115.20.0; before 135.0; 128.1.0 before 128.7.0 · source: NVD
TH
Thunderbird · Mozilla
128.0.1 before 128.7.0; 131.0 before 135.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-1009
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-1009
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/
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