CVE-2025-48954: Discourse

Medium severity, CVSS 6.1. EPSS: 0.7% chance of exploitation in the next 30 days.

Discourse is an open-source discussion platform. Versions prior to 3.5.0.beta6 are vulnerable to cross-site scripting when the content security policy isn't enabled when using social logins. Version 3.5.0.beta6 patches the issue. As a workaround, have the content security policy enabled.

Affected products

• Discourse Discourse: before 3.5.0 (fixed in 3.5.0); version 3.5.0 only

Published 2025-06-25. Last modified 2026-06-17.