CVE-2025-1781

CVSS 8.4 HIGHEPSS 0.3%CWE-611

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:H/SA:L

Affected products

W3C · CSS Validator

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References

https://github.com/google/security-research/security/advisories/GHSA-745m-xmq6-g6x7