Vulnerability · Published Mar 28, 2025 · Assigned by Google
CVE-2025-1781
High 8.4
In plain English
A high-severity XML external entity in CSS Validator from W3C. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 34% of all known vulnerabilities).
Severity (CVSS 4.0)8.4High
Exploit odds (30 days)0.4%top 66.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official 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 (as reported)
| Vendor | Product | Versions |
|---|---|---|
| W3C | CSS Validator | < cssval-20250226 |
Weakness: CWE-611 · Vector: 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