CVE-2026-33411
Medium
Description
Discourse is an open-source discussion platform. Versions prior to 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 have a potential stored XSS in topic titles for the solved posts stream. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. As a workaround, ensure that the Content Security Policy is enabled, and has not been modified in a way which would make it more vulnerable to XSS attacks.
SeverityMedium
CVSS5.4
Exploit probability—
Product
Discourse
PublishedMar 20, 2026
First seenMar 20, 2026
Weakness typeCWE-79Cross-site scripting (XSS)
How to fix
Update
- discourse discourse2026.1.2, 2026.2.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| discourse discourse | 2026.1.0 ≤ v < 2026.1.2, 2026.2.0 ≤ v < 2026.2.1, 2026.3.0 | 2026.1.2, 2026.2.1 |
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