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.
Scores
CVSS v3
6.5
EPSS
0.0028
EPSS Percentile
51.5%
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