CVE-2025-1781

8.4 highEPSS 0.4%

High (8.4) in w3 css validator. EPSS 0.4% chance of exploitation in the next 30 days.

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.

Severity

CVSS 4.0

8.4 high

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

CVSS 3.1

6.5 medium

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS: 0.4% chance of exploitation in the next 30 days; higher than 33% of CVEs (scores of 2026-10-31)
CWE: CWE-611
Published: 2025-03-28
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

w3:css_validator

References

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

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