CVE-2025-5271

MEDIUM

Firefox < 139.0 - Content Injection via Devtools Response Preview

Title source: llm
STIX 2.1

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.

References (3)

Core 3

Scores

CVSS v3 6.5
EPSS 0.0025
EPSS Percentile 15.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-116
Status published
Products (3)
mozilla/firefox < 139.0
Mozilla/Firefox 139
Mozilla/Thunderbird 139
Published May 27, 2025
Tracked Since Feb 18, 2026