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
CPE		cpe:2.3:a:w3:css_validator::::::::
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 6.5
First Time		W3 css Validator W3
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
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

{"id": "CVE-2025-1781", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 3.6, "exploitabilityScore": 2.8}], "cvssMetricV40": [{"type": "Secondary", "source": "cve-coordination@google.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 8.4, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "HIGH", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS: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", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "subIntegrityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "LOW", "vulnAvailabilityImpact": "LOW", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "published": "2025-03-28T14:15:19.687", "references": [{"url": "https://github.com/google/security-research/security/advisories/GHSA-745m-xmq6-g6x7", "tags": ["Exploit", "Vendor Advisory"], "source": "cve-coordination@google.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "cve-coordination@google.com", "description": [{"lang": "en", "value": "CWE-611"}]}], "descriptions": [{"lang": "en", "value": "There is a XXE in W3CSS Validator versions before\u00a0cssval-20250226 that allows an attacker to use specially-crafted XML objects to coerce server-side request forgery (SSRF).\u00a0 This could be exploited to read arbitrary local files if an attacker has access to exception messages."}, {"lang": "es", "value": "Existe una excepci\u00f3n 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 podr\u00eda aprovecharse para leer archivos locales arbitrarios si un atacante tiene acceso a los mensajes de excepci\u00f3n."}], "lastModified": "2025-08-01T17:54:11.577", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:w3:css_validator:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DF6CCBA7-8EFB-484B-8511-969FA8EDBB6F", "versionEndExcluding": "20250226"}], "operator": "OR"}]}], "sourceIdentifier": "cve-coordination@google.com"}