CVE-2026-55424
Discourse: Topic featured link susceptible to stored XSS
CVSS Score
0.0
EPSS Score
0.5%
EPSS Percentile
37th
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.
| CWE | CWE-79 |
| Vendor | discourse |
| Product | discourse |
| Published | Jul 9, 2026 |
| Last Updated | Jul 10, 2026 |
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Affected Versions
discourse / discourse
>= 2026.1.0-latest, < 2026.1.5 >= 2026.4.0-latest, < 2026.4.2 >= 2026.5.0-latest, < 2026.5.1
References
github.com: https://github.com/discourse/discourse/security/advisories/GHSA-695w-7fv8-mxg3 github.com: https://github.com/discourse/discourse/commit/1bce8881e4253d9bbab56f011a12ef899b926b59 github.com: https://github.com/discourse/discourse/commit/6679d9a5083488bae10c2adbb345c481c583242c github.com: https://github.com/discourse/discourse/commit/6828aee9b15c2655d63b515ac919830bd540ff83 github.com: https://github.com/discourse/discourse/commit/c9b9405f5bd0bf0269e505e28e3aad388d7657c5 github.com: https://github.com/discourse/discourse/releases/tag/v2026.1.5 github.com: https://github.com/discourse/discourse/releases/tag/v2026.4.2 github.com: https://github.com/discourse/discourse/releases/tag/v2026.5.1 github.com: https://github.com/discourse/discourse/releases/tag/v2026.6.0