Description
In CSS Validator less than or equal to commit 54d68a1, there is a cross-site scripting vulnerability in handling URIs. A user would have to click on a specifically crafted validator link to trigger it. This has been patched in commit e5c09a9.
Remediation
References
https://github.com/w3c/css-validator/commit/e5c09a9119167d3064db786d5f00d730b584a53b
https://github.com/w3c/css-validator/security/advisories/GHSA-wf36-7w73-rh8c
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