CVE-2025-4919

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-4919
An attacker was able to perform an out-of-bounds read or write on a JavaScript object by confusing array index sizes. This vulnerability affects Firefox < 138.0.4, Firefox ESR < 128.10.1, Firefox ESR < 115.23.1, Thunderbird < 128.10.2, and Thunderbird < 138.0.2.

8.8 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://bugzilla.mozilla.org/show_bug.cgi?id=1966614 Permissions Required
https://www.mozilla.org/security/advisories/mfsa2025-36/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-37/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-38/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-40/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-41/ Vendor Advisory
Configurations

Configuration 1 (hide)

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

28 May 2025, 14:08

Type Values Removed Values Added
References () https://bugzilla.mozilla.org/show_bug.cgi?id=1966614 - () https://bugzilla.mozilla.org/show_bug.cgi?id=1966614 - Permissions Required
References () https://www.mozilla.org/security/advisories/mfsa2025-36/ - () https://www.mozilla.org/security/advisories/mfsa2025-36/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2025-37/ - () https://www.mozilla.org/security/advisories/mfsa2025-37/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2025-38/ - () https://www.mozilla.org/security/advisories/mfsa2025-38/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2025-40/ - () https://www.mozilla.org/security/advisories/mfsa2025-40/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2025-41/ - () https://www.mozilla.org/security/advisories/mfsa2025-41/ - Vendor Advisory
CPE cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*
First Time Mozilla firefox
Mozilla thunderbird
Mozilla

22 May 2025, 13:15

Type Values Removed Values Added
Summary (en) An attacker was able to perform an out-of-bounds read or write on a JavaScript object by confusing array index sizes. This vulnerability affects Firefox < 138.0.4, Firefox ESR < 128.10.1, and Firefox ESR < 115.23.1. (en) An attacker was able to perform an out-of-bounds read or write on a JavaScript object by confusing array index sizes. This vulnerability affects Firefox < 138.0.4, Firefox ESR < 128.10.1, Firefox ESR < 115.23.1, Thunderbird < 128.10.2, and Thunderbird < 138.0.2.
References
  • () https://www.mozilla.org/security/advisories/mfsa2025-40/ -
  • () https://www.mozilla.org/security/advisories/mfsa2025-41/ -

19 May 2025, 16:15

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 8.8
CWE CWE-125
CWE-787

19 May 2025, 13:35

Type Values Removed Values Added
Summary
  • (es) Un atacante logró realizar una lectura o escritura fuera de los límites en un objeto JavaScript al confundir el tamaño del índice de la matriz. Esta vulnerabilidad afecta a Firefox (versión anterior a 138.0.4), Firefox ESR (versión anterior a 128.10.1) y Firefox ESR (versión anterior a 115.23.1).

18 May 2025, 20:15

Type Values Removed Values Added
Summary (en) An attacker was able to perform an out-of-bounds read or write on a JavaScript object by confusing array index sizes. This vulnerability affects Firefox ESR < 115.23.1. (en) An attacker was able to perform an out-of-bounds read or write on a JavaScript object by confusing array index sizes. This vulnerability affects Firefox < 138.0.4, Firefox ESR < 128.10.1, and Firefox ESR < 115.23.1.
References
  • () https://www.mozilla.org/security/advisories/mfsa2025-36/ -
  • () https://www.mozilla.org/security/advisories/mfsa2025-37/ -

17 May 2025, 22:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-05-17 22:15

Updated : 2025-05-28 14:08

NVD link : CVE-2025-4919

Mitre link : CVE-2025-4919

CVE.ORG link : CVE-2025-4919

JSON object : View

Products Affected

mozilla

  • firefox
  • thunderbird
CWE
CWE-125

Out-of-bounds Read

CWE-787

Out-of-bounds Write