CVE-2025-1781

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 v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/google/security-research/security/advisories/GHSA-745m-xmq6-g6x7	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:w3:css_validator:*:*:*:*:*:*:*:*

History

01 Aug 2025, 17:54

Type	Values Removed	Values Added
First Time		W3 W3 css Validator
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 6.5
References	~~() https://github.com/google/security-research/security/advisories/GHSA-745m-xmq6-g6x7 -~~	() https://github.com/google/security-research/security/advisories/GHSA-745m-xmq6-g6x7 - Exploit, Vendor Advisory
CPE		cpe:2.3:a:w3:css_validator::::::::
Summary		(es) Existe una excepción XXE en las versiones del Validador W3CSS anteriores a cssval-20250226 que permite a un atacante usar objetos XML especialmente manipulados para forzar server-side request forgery (SSRF). Esto podría aprovecharse para leer archivos locales arbitrarios si un atacante tiene acceso a los mensajes de excepción.

28 Mar 2025, 14:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-03-28 14:15

Updated : 2025-08-01 17:54

NVD link : CVE-2025-1781

Mitre link : CVE-2025-1781

CVE.ORG link : CVE-2025-1781

JSON object : View

Products Affected

w3

css_validator

CWE

CWE-611

Improper Restriction of XML External Entity Reference

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