Description
There is a XXE in W3CSS Validator versions before cssval-20250226 that allows an attacker to use specially-crafted XML objects to coerce server-side request forgery (SSRF). This could be exploited to read arbitrary local files if an attacker has access to exception messages.
References (1)
Core 1
Core References
Exploit, Vendor Advisory
https://github.com/google/security-research/security/advisories/GHSA-745m-xmq6-g6x7
Scores
CVSS v3
6.5
EPSS
0.0031
EPSS Percentile
22.4%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-611
Status
published
Products (1)
w3/css_validator
< 20250226
Published
Mar 28, 2025
Tracked Since
Feb 18, 2026