{"id":"UBUNTU-CVE-2025-56200","details":"A URL validation bypass vulnerability exists in validator.js through version 13.15.15. The isURL() function uses '://' as a delimiter to parse protocols, while browsers use ':' as the delimiter. This parsing difference allows attackers to bypass protocol and domain validation by crafting URLs leading to XSS and Open Redirect attacks.","modified":"2025-10-24T05:23:36Z","published":"2025-09-30T18:15:00Z","upstream":["CVE-2025-56200"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-56200"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2025-56200"}],"affected":[{"package":{"name":"validator.js","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/validator.js@4.7.1+dfsg1-1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.17.0+dfsg1-1","4.7.1+dfsg1-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libjs-validator","binary_version":"4.7.1+dfsg1-1"},{"binary_name":"node-validator","binary_version":"4.7.1+dfsg1-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-56200.json"}},{"package":{"name":"validator.js","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/validator.js@4.7.1+dfsg1-1.1?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.7.1+dfsg1-1.1"],"ecosystem_specific":{"binaries":[{"binary_name":"libjs-validator","binary_version":"4.7.1+dfsg1-1.1"},{"binary_version":"4.7.1+dfsg1-1.1","binary_name":"node-validator"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-56200.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"},{"type":"Ubuntu","score":"medium"}]}