VULNERABILITY INTELLIGENCE

CVE-2025-5271

CVSS score6.5 MEDIUM
EPSS probability0.30%
CISA KEVNot currently listed
Published2025-05-27
Last modified2026-09-30
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Description

Previewing a response in Devtools ignored CSP headers, which could have allowed content injection attacks. This vulnerability was fixed in Firefox 139 and Thunderbird 139.

Weakness classification

  • CWE-116: Improper Encoding or Escaping of Output

Primary references