{"id":"CVE-2020-4070","aliases":["EUVD-2020-25322","GHSA-wf36-7w73-rh8c"],"status":"published","title":"Cross-site Scripting in CSS Validator","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.","severity":{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.0055,"percentile":0.46309,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2020-06-22T15:40:12Z","modified":"2026-10-20T14:13:58Z","products":[{"vendor":"w3c","product":"css validator"},{"vendor":"w3c","product":"css_validator"},{"vendor":"world wide web consortium (w3c)","product":"css validator"}],"references":[{"url":"https://github.com/w3c/css-validator/security/advisories/GHSA-wf36-7w73-rh8c","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory","advisory"]},{"url":"https://github.com/w3c/css-validator/commit/e5c09a9119167d3064db786d5f00d730b584a53b","tags":["x_refsource_MISC","x_transferred","Patch","fix"]}],"sources":{"cve":[{"id":"CVE-2020-4070","title":"Cross-site Scripting in CSS Validator","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.","status":"published","published":"2020-06-22T15:40:12Z","modified":"2024-08-04T07:52:20.971Z","cvss":[{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:35:56.213477Z"}],"euvd":[{"id":"EUVD-2020-25322","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.","status":"published","published":"2020-06-22T15:40:12Z","modified":"2024-08-04T07:52:20Z","cvss":[{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-03T03:08:07.872525Z"}],"nvd":[{"id":"CVE-2020-4070","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.","status":"published","published":"2020-06-22T16:15:11.963Z","modified":"2026-06-17T03:19:31.04Z","cvss":[{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":3.5,"vector":"AV:N/AC:M/Au:S/C:N/I:P/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:06:07.249892Z"}],"osv":[{"id":"CVE-2020-4070","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.","status":"published","published":"2020-06-22T16:15:11.963Z","modified":"2026-10-20T14:13:58.838282939Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:16.936975Z"}]}}