VULNERABILITY INTELLIGENCE

CVE-2025-5266

CVSS score4.3 MEDIUM
EPSS probability0.34%
CISA KEVNot currently listed
Published2025-05-27
Last modified2026-10-05
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

Description

Script elements loading cross-origin resources generated load and error events which leaked information enabling XS-Leaks attacks. This vulnerability was fixed in Firefox 139, Firefox ESR 128.11, Thunderbird 139, and Thunderbird 128.11.

Weakness classification

  • 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-200

Primary references