{"id":"BIT-discourse-2026-55424","summary":"Discourse: Topic featured link susceptible to stored XSS","details":"Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, a topic \"featured link\" was not sufficiently normalized and escaped before being rendered in the topic list, allowing a user who can set a featured link to inject JavaScript when default Content Security Policy protections were modified or disabled. This issue is fixed in versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5.","aliases":["CVE-2026-55424","GHSA-695w-7fv8-mxg3"],"modified":"2026-09-08T08:46:23.654590475Z","published":"2026-07-15T15:56:25.576Z","database_specific":{"cpes":["cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:*"],"severity":"High"},"references":[{"type":"FIX","url":"https://github.com/discourse/discourse/commit/1bce8881e4253d9bbab56f011a12ef899b926b59"},{"type":"FIX","url":"https://github.com/discourse/discourse/commit/6679d9a5083488bae10c2adbb345c481c583242c"},{"type":"FIX","url":"https://github.com/discourse/discourse/commit/6828aee9b15c2655d63b515ac919830bd540ff83"},{"type":"FIX","url":"https://github.com/discourse/discourse/commit/c9b9405f5bd0bf0269e505e28e3aad388d7657c5"},{"type":"ARTICLE","url":"https://github.com/discourse/discourse/releases/tag/v2026.1.5"},{"type":"ARTICLE","url":"https://github.com/discourse/discourse/releases/tag/v2026.4.2"},{"type":"ARTICLE","url":"https://github.com/discourse/discourse/releases/tag/v2026.5.1"},{"type":"ARTICLE","url":"https://github.com/discourse/discourse/releases/tag/v2026.6.0"},{"type":"ADVISORY","url":"https://github.com/discourse/discourse/security/advisories/GHSA-695w-7fv8-mxg3"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55424"}],"affected":[{"package":{"name":"discourse","ecosystem":"Bitnami","purl":"pkg:bitnami/discourse"},"ranges":[{"type":"SEMVER","events":[{"introduced":"2026.1.0"},{"fixed":"2026.1.5"},{"introduced":"2026.4.0"},{"fixed":"2026.4.2"},{"introduced":"2026.5.0"},{"fixed":"2026.5.1"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/discourse/BIT-discourse-2026-55424.json"},"severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/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"}]}],"schema_version":"1.9.0"}