CVE-2026-59830

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...

CVE-2026-59830 Discourse: Stored XSS via unescaped actor name in post actions

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...

CVE-2026-59830 Discourse: Stored XSS via unescaped actor name in post actions

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...

CVE-2026-59830

Discourse , an open-source discussion platform, is affected by a stored XSS in the post action component prior to version 2026.7.0 . The root cause is that user-controlled display names are not escaped before being interpolated into an HTML string passed to trustHTML, allowing an attacker who cra...