CVE-2025-5263

Public on 2025-05-27
Modified on 2025-05-29
Description
Error handling for script execution was incorrectly isolated from web content, which could have allowed cross-origin leak attacks. This vulnerability affects Firefox < 139, Firefox ESR < 115.24, and Firefox ESR < 128.11.
Severity
Medium severity
Medium
See what this means
CVSS v3 Base Score
4.3
See breakdown

Affected Packages

Platform Package Release Date Advisory Status
Amazon Linux 2 - Firefox Extra firefox 2025-06-11 ALAS2FIREFOX-2025-039 Fixed
Amazon Linux 2023 firefox 2025-06-10 ALAS2023-2025-996 Fixed
Amazon Linux 2 - Core thunderbird 2025-06-12 ALAS2-2025-2873 Fixed

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 4.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
NVD CVSSv3 4.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N