Critical severity · published Oct 14, 2025
CVE-2025-11710
A compromised web process using malicious IPC messages could have caused the privileged browser process to reveal blocks of its memory to the compromised process
9.8
CVSS
0.4%
EPSS
No
On KEV
Description
A compromised web process using malicious IPC messages could have caused the privileged browser process to reveal blocks of its memory to the compromised process. This vulnerability was fixed in Firefox 144, Firefox ESR 115.29, Firefox ESR 140.4, Thunderbird 144, and Thunderbird 140.4.
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)0.4% · higher than 36% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FI
Firefox · Mozilla
before 115.29.0; before 144.0; 116.0 before 140.4.0 · source: NVD
TH
Thunderbird · Mozilla
before 140.4.0; 141.0 before 144.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-11710
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-11710
Issue Tracking
https://bugzilla.mozilla.org/show_bug.cgi?id=1989899
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-81/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-82/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-83/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-84/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-85/
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