CVE-2025-5269

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-5269
Memory safety bug present in Firefox ESR 128.10, and Thunderbird 128.10. This bug showed evidence of memory corruption and we presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 128.11 and Thunderbird < 128.11.

6.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://bugzilla.mozilla.org/show_bug.cgi?id=1924108 Permissions Required
https://www.mozilla.org/security/advisories/mfsa2025-44/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-46/
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
History

11 Jun 2025, 12:15

Type Values Removed Values Added
Summary (en) Memory safety bug present in Firefox ESR 128.10, and Thunderbird 128.10. This bug showed evidence of memory corruption and we presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 128.11. (en) Memory safety bug present in Firefox ESR 128.10, and Thunderbird 128.10. This bug showed evidence of memory corruption and we presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 128.11 and Thunderbird < 128.11.
References
  • () https://www.mozilla.org/security/advisories/mfsa2025-46/ -

30 May 2025, 01:15

Type Values Removed Values Added
References () https://bugzilla.mozilla.org/show_bug.cgi?id=1924108 - () https://bugzilla.mozilla.org/show_bug.cgi?id=1924108 - Permissions Required
References () https://www.mozilla.org/security/advisories/mfsa2025-44/ - () https://www.mozilla.org/security/advisories/mfsa2025-44/ - Vendor Advisory
First Time Mozilla
Mozilla thunderbird
Mozilla firefox
CPE cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*

28 May 2025, 15:01

Type Values Removed Values Added
Summary
  • (es) Error de seguridad de memoria presente en Firefox ESR 128.10 y Thunderbird 128.10. Este error mostró evidencia de corrupción de memoria y presumimos que, con suficiente esfuerzo, podría haberse explotado para ejecutar código arbitrario. Esta vulnerabilidad afecta a Firefox ESR &lt; 128.11.

27 May 2025, 18:15

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 6.5
CWE CWE-787

27 May 2025, 13:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-05-27 13:15

Updated : 2025-06-11 12:15

NVD link : CVE-2025-5269

Mitre link : CVE-2025-5269

CVE.ORG link : CVE-2025-5269

JSON object : View

Products Affected

mozilla

  • firefox
  • thunderbird
CWE
CWE-787

Out-of-bounds Write