{"id":"CVE-2026-44401","aliases":["EUVD-2026-55793","GHSA-8vfw-vh7q-p649"],"status":"published","title":"Typemill CMS 2.x Persistent XSS via Markdown javascript URI","description":"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.","severity":{"version":"4.0","score":4.6,"vector":"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","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.0032,"percentile":0.25262,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-79"],"published":"2026-08-10T19:29:40Z","modified":"2026-11-08T14:03:32Z","exploits":[{"source":"pocgithub","id":"sn0x-sharma/CVE-2026-44401","title":"sn0x-sharma/CVE-2026-44401","date":"2026-08-11","url":"https://github.com/sn0x-sharma/CVE-2026-44401"}],"products":[{"vendor":"typemill","product":"typemill"}],"references":[{"url":"https://github.com/typemill/typemill","tags":["product","package"]},{"url":"https://github.com/typemill/typemill/releases/tag/v2.23.0","tags":["patch","release-notes","fix"]},{"url":"https://www.vulncheck.com/advisories/typemill-cms-2-x-persistent-xss-via-markdown-javascript-uri","tags":["third-party-advisory","advisory"]},{"url":"https://github.com/sn0x-sharma/CVE-2026-44401","tags":["technical-description","article"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-44401","tags":["advisory"]},{"url":"https://github.com/typemill/typemill/releases/tag/2.23.0"},{"url":"https://github.com/advisories/GHSA-8vfw-vh7q-p649"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44401.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-44401","title":"Typemill CMS 2.x Persistent XSS via Markdown javascript URI","description":"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.","status":"published","published":"2026-08-10T19:29:40.95Z","modified":"2026-11-08T14:03:32.715Z","cvss":[{"version":"4.0","score":4.6,"vector":"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","level":"medium","assessor":"cna"},{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-08T15:43:33.322657Z"}],"euvd":[{"id":"EUVD-2026-55793","description":"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.","status":"published","published":"2026-08-10T19:29:40Z","modified":"2026-11-08T14:03:32Z","cvss":[{"version":"4.0","score":4.6,"vector":"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","level":"medium"}],"updated_at":"2026-11-08T15:13:08.77824Z"}],"ghsa":[{"id":"GHSA-8vfw-vh7q-p649","title":"Typemill CMS version 2.x contains a persistent cross-site scripting vulnerability in the Markdown...","description":"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.","status":"published","published":"2026-08-10T21:32:04Z","modified":"2026-08-11T15:33:27Z","cvss":[{"version":"4.0","score":4.6,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"},{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:10:17.573081Z"}],"nvd":[{"id":"CVE-2026-44401","description":"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.","status":"published","published":"2026-08-10T20:17:30.87Z","modified":"2026-09-10T20:44:57.447Z","cvss":[{"version":"4.0","score":4.6,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"},{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:12:36.102748Z"}],"osv":[{"id":"CVE-2026-44401","title":"Typemill CMS 2.x Persistent XSS via Markdown javascript URI","description":"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.","status":"published","published":"2026-08-10T19:29:40.95Z","modified":"2026-11-09T02:30:17.229674476Z","cvss":[{"version":"4.0","score":4.6,"vector":"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","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-09T03:16:48.35602Z"}]}}