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CVE-2025-1781

Good to know:

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Date: March 28, 2025

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 Score

Related Resources (3)

https://nvd.nist.gov/vuln/detail/CVE-2025-1781
https://github.com/google/security-research/security/advisories/GHSA-745m-xmq6-g6x7
https://www.mend.io/vulnerability-database/CVE-2025-1781

Severity Score

Weakness Type (CWE)

Improper Restriction of XML External Entity Reference

CWE-611

Top Fix

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Upgrade Version

Upgrade to version https://github.com/w3c/css-validator.git - cssval-20250226

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): NONE
Availability (A): NONE

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