{"id":"BIT-discourse-2026-59830","summary":"Discourse: Stored XSS via unescaped actor name in post actions","details":"Discourse is an open-source discussion platform. Prior to 2026.7.0, the post action component failed to escape user-controlled display names before interpolating them into an HTML string passed to trustHTML. A user who could choose a crafted display name could persist markup in post action descriptions. Viewing the affected user activity streams could execute attacker-controlled script in another user's browser. This issue is fixed in version 2026.7.0.","aliases":["CVE-2026-59830","GHSA-x6mf-p7cg-69rw"],"modified":"2026-09-29T10:10:41.474982926Z","published":"2026-09-29T08:46:16.108Z","database_specific":{"severity":"Medium","cpes":["cpe:2.3:a:discourse:discourse:*:*:*:*:stable:*:*:*","cpe:2.3:a:discourse:discourse:*:*:*:*:beta:*:*:*"]},"references":[{"type":"WEB","url":"https://github.com/discourse/discourse/commit/dd786594ddd088657a7e6f9fefba5bd889965fe4"},{"type":"WEB","url":"https://github.com/discourse/discourse/releases/tag/v2026.7.0"},{"type":"WEB","url":"https://github.com/discourse/discourse/security/advisories/GHSA-x6mf-p7cg-69rw"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-59830"}],"affected":[{"package":{"name":"discourse","ecosystem":"Bitnami","purl":"pkg:bitnami/discourse"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2026.7.0"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/discourse/BIT-discourse-2026-59830.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"}]}],"schema_version":"1.9.0"}