EPSS
Percentile
22.7%
css-validator is vulnerable to cross-site scripting (XSS). A remote attacker is able to inject and execute arbitrary Javascript in a user’s browser via the URL when an error message is displayed.
github.com/w3c/css-validator/commit/e5c09a9119167d3064db786d5f00d730b584a53b
github.com/w3c/css-validator/issues/278
github.com/w3c/css-validator/security/advisories/GHSA-wf36-7w73-rh8c