Security Advisory

CVE-2026-55424

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-07-09 22:01:22

Last updated 2026-07-10 14:40:09

Assigner GitHub_M

CVSS score 7.4

State PUBLISHED

Description

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.

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