What’s Vulnerable › Vulnerabilities
CVE-2025-1781
- Severity: medium (CVSS 6.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: yes
- Published: 2025-03-28 · updated 2026-06-17
- Weakness: CWE-611
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.
Affected products
- W3C CSS Validator: before 20250226 — fixed in 20250226
How to fix
Upgrade to a fixed version: W3C CSS Validator 20250226. Check the vendor advisory for mitigations.
References
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