CVE-2026-27154
Discourse has XSS when editing a malicious post
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, a user full name can be evaluated as raw HTML when the following settings are set: `display_name_on_posts` => true; and `prioritize_username_in_ux` => false. Editing a post of a malicious user would trigger an XSS. Versions 2025.12.2, 2026.1.1, and 2026.2.0 patch the issue. No known workarounds are available.
| CWE | CWE-79 |
| Vendor | discourse |
| Product | discourse |
| Published | Feb 26, 2026 |
| Last Updated | Mar 2, 2026 |
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Affected Versions
discourse / discourse
< 2025.12.2 >= 2026.1.0-latest, < 2026.1.1 >= 2026.2.0-latest, < 2026.2.0