{"id":"CVE-2026-44401","summary":"Typemill CMS 2.x Persistent XSS via Markdown javascript URI","details":"Typemill CMS version 2.x contains a persistent cross-site scripting vulnerability in the Markdown parser extension that allows authenticated users with theme-configuration access to inject malicious JavaScript URIs by supplying unsanitized href values in Markdown links. Attackers can craft Markdown links using the javascript: scheme through ParsedownExtension.php or TwigMarkdownExtension.php, storing a persistent payload that executes in the browser of every visitor who clicks the link, enabling session cookie theft, authenticated request forgery, and credential harvesting.","modified":"2026-09-12T03:30:20.397211709Z","published":"2026-08-10T19:29:40.950Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-79"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44401.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44401.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-44401"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/typemill-cms-2-x-persistent-xss-via-markdown-javascript-uri"},{"type":"FIX","url":"https://github.com/typemill/typemill/releases/tag/v2.23.0"},{"type":"PACKAGE","url":"https://github.com/typemill/typemill"},{"type":"ARTICLE","url":"https://github.com/sn0x-sharma/CVE-2026-44401"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/typemill/typemill","events":[{"introduced":"0"},{"fixed":"31b72eacb43cd684edd396c53664b0ecabdf2cf5"}],"database_specific":{"extracted_events":[{"introduced":"2.0.0"},{"last_affected":"2.23.0"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["v2.22.0","v2.21.3","v2.21.2","v2.21.1","v2.21.0","v2.20.2","v2.20.1","v2.20.0","v2.19.4","v2.19.3","v2.19.2","v2.19.1","v2.19.0","v2.18.4","v2.18.3","v2.18.2","v2.18.1","v2.18.0","v2.17.4","v2.17.1","v2.17.3","v2.17.2","v2.17.0","latest","2.16.2","2.16.1","2.16.0","2.15.0","2.6.0","1.1.6","1.1.5","1.1.4","1.1.3","1.1.2","1.1.1.0","1.1.1","1.1.01","1.1.0","1.0.3","1.0.2","1.0.1","1.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44401.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:N/VI:L/VA:L/SC:N/SI:L/SA:L"}]}