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CVE-2025-1781

MEDIUM
6.5
CVSS Score
Published: March 28, 2025 at 01:48 PM UTC
Updated: June 17, 2026 at 08:39 AM UTC
2 products affected across 2 vendorsCss ValidatorCSS Validator

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.4%
SSVC
PoC

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Css Validator· W3
95%
v < 20250226
Affected range stops below 20250226, so it looks safe — our inference, not a vendor statement
CSS Validator· W3C
60%
v < cssval-20250226
Affected range stops below cssval-20250226, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

ExploitVendor Advisory
Source: [email protected]
https://github.com/google/security-research/security/advisories/GHSA-745m-xmq6-g6x7

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-611

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