Memory Exposure Vulnerability in Firefox and Thunderbird by Mozilla
CVE-2025-11710

9.8CRITICAL

Key Information:

Vendor

Mozilla
Status
Firefox
Firefox Esr
Thunderbird
Vendor
CVE Published:
14 October 2025

What is CVE-2025-11710?

A vulnerability exists in Mozilla Firefox and Thunderbird where a compromised web process could exploit malicious inter-process communication (IPC) messages. This could lead to the privileged browser process disclosing sensitive memory blocks to the potentially malicious process. The vulnerability impacts several versions of Firefox and Thunderbird, necessitating prompt updates to mitigate the risk of unauthorized information access.

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Affected Version(s)

Firefox < 144

Firefox ESR < 115.29

Firefox ESR < 140.4

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1989899
https://www.mozilla.org/security/advisories/mfsa2025-81/
https://www.mozilla.org/security/advisories/mfsa2025-82/

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Oskar L
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