{"id":"CVE-2020-4070","details":"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.","aliases":["GHSA-wf36-7w73-rh8c"],"modified":"2026-07-09T01:25:34.170473Z","published":"2020-06-22T16:15:11.963Z","database_specific":{"unresolved_ranges":[{"source":"CPE_RANGE","vendor_product":"w3c:css_validator","cpes":["cpe:2.3:a:w3c:css_validator:*:*:*:*:*:*:*:*"],"extracted_events":[{"last_affected":"2020-01-19"}]}]},"references":[{"type":"ADVISORY","url":"https://github.com/w3c/css-validator/security/advisories/GHSA-wf36-7w73-rh8c"},{"type":"FIX","url":"https://github.com/w3c/css-validator/commit/e5c09a9119167d3064db786d5f00d730b584a53b"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/w3c/css-validator","events":[{"introduced":"0"},{"fixed":"e5c09a9119167d3064db786d5f00d730b584a53b"}],"database_specific":{"source":"REFERENCES"}}],"versions":["cssval-20190320","cssval-201801","cssval-1-alpha"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-4070.json","vanir_signatures_modified":"2026-07-09T01:25:34Z","vanir_signatures":[{"source":"https://github.com/w3c/css-validator/commit/e5c09a9119167d3064db786d5f00d730b584a53b","target":{"file":"org/w3c/css/css/StyleSheetParser.java","function":"parseURL"},"deprecated":false,"digest":{"function_hash":"327506727195512130857608281471890945436","length":1498},"id":"CVE-2020-4070-27bf7adc","signature_type":"Function","signature_version":"v1"},{"source":"https://github.com/w3c/css-validator/commit/e5c09a9119167d3064db786d5f00d730b584a53b","target":{"file":"org/w3c/css/css/StyleSheetParser.java"},"deprecated":false,"digest":{"line_hashes":["287126531491259831142828594517899965709","166151882237851564633381564464035597352","217623342706874349683039718344875380745","25486391784260251365600363288280579394"],"threshold":0.9},"id":"CVE-2020-4070-dd4b0a2a","signature_type":"Line","signature_version":"v1"}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"}]}