8.4
CWE
611 918
Advisory Published
Updated

CVE-2025-1781: XEE

First published: Fri Mar 28 2025(Updated: )

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.

Credit: cve-coordination@google.com

Affected SoftwareAffected VersionHow to fix
W3C CSS Validator<cssval-20250226

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Frequently Asked Questions

  • What is the severity of CVE-2025-1781?

    The severity of CVE-2025-1781 is considered to be high due to its potential for SSRF and unauthorized file access.

  • How do I fix CVE-2025-1781?

    To fix CVE-2025-1781, upgrade the W3CSS Validator to version cssval-20250226 or later.

  • What kind of attack is associated with CVE-2025-1781?

    CVE-2025-1781 is associated with an XML External Entity (XXE) attack that can lead to server-side request forgery (SSRF).

  • Can CVE-2025-1781 allow access to local files?

    Yes, CVE-2025-1781 can be exploited to read arbitrary local files if an attacker gains access to exception messages.

  • Which versions of W3CSS Validator are affected by CVE-2025-1781?

    W3CSS Validator versions prior to cssval-20250226 are affected by CVE-2025-1781.

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