rootpwn

medium · CVSS v3 5.4

CVE-2026-59830

Discourse is an open-source discussion platform. Prior to 2026.7.0, the post action component failed to escape user-cont…

Description

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.

Scores

Severity
medium
CVSS v2
5.5
CVSS v3
5.4
CVSS v4
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EPSS
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