CVE-2025-1781: w3 css_validator
CVSS: 8.4v4.0HighAnalyzed
Published 28-03-2025Last modified 28-03-2025
Vulnerability summary
CVE-2025-1781 is a high (CVSS 8.4) vulnerability in w3 css_validator. EPSS estimates a 0.39% chance of exploitation in the next 30 days, higher than 32.2% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
8.4/10
010
High · v4.0 (CVE.org)EPSS score
0.39%
0%100%
Low · +0.01 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github
Timeline
- 28-03-2025PublishedVulnerability first disclosed.
- 28-03-2025Last modifiedVulnerability information updated.
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.
CVSS metrics
3 scores · 2 sources · 2 versionsHigh 8.4Preferred score · CVE.org (CNA)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:H/SA:LSourcesAll 2 agree
- NVDNIST8.4HighCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:H/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Medium 6.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:NSourcesSingle source
EPSS trend
Probability
0.39%
Chance of exploitation in the next 30 days
Percentile
32%
Versus all other CVEs
30-day change
+0.01 pp
From 0.38% on 21-09-2026
21-09-202621-10-2026
EPSS score0.39%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundSecurity Research
Maturity: poc
Weaknesses
CWE · root causeAffected systems
W31 product
- css_validator< 20250226
W3c1 product
- css_validator< cssval-20250226
2 vendors · 2 products