CVE-2025-1781

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.

Category

8.4
CVSS
Severity: High
CVSS 4.0 •
EPSS 0.05%
Affected: W3C CSS Validator
Published at:
Updated at:

References

Link Tags
https://github.com/google/security-research/security/advisories/GHSA-745m-xmq6-g6x7

Frequently Asked Questions

What is the severity of CVE-2025-1781?
CVE-2025-1781 has been scored as a high severity vulnerability.
How to fix CVE-2025-1781?
To fix CVE-2025-1781, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-1781 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-1781 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-1781?
CVE-2025-1781 affects W3C CSS Validator.
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