PT-2026-29306 · Discourse · Discourse

Martin-Brennan · Published 2026-03-31 · Updated 2026-04-07 · CVE-2026-32273

Positive Technologies (AI Summary)

CVSS v3.1

5.4

Medium

Base vector

AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions Discourse versions 2026.1.0 through 2026.1.2, 2026.2.0 through 2026.2.1, and 2026.3.0 through 2026.3.0

Description Discourse, an open-source discussion platform, is affected by a cross-site scripting (XSS) issue. Updating a category description through the API does not properly sanitize the input string, potentially allowing for the injection of malicious scripts. The API endpoint used for updating category descriptions is vulnerable. The description parameter is not sanitized, enabling XSS attacks.

Recommendations Update to Discourse version 2026.1.3 or later. Update to Discourse version 2026.2.2 or later. Update to Discourse version 2026.3.0 or later.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

BIT-DISCOURSE-2026-32273

CVE-2026-32273

GHSA-H2H4-767X-6PC8

Affected Products

Discourse

References · 6

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/32xxx/CVE-2026-32273.json · Exploit
• https://osv.dev/vulnerability/CVE-2026-32273 · Vendor Advisory
• https://osv.dev/vulnerability/BIT-discourse-2026-32273 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-32273 · Security Note
• https://github.com/discourse/discourse/security/advisories/GHSA-h2h4-767x-6pc8 · Note
• https://github.com/discourse/discourse/commit/05e3da2a670cfd499649128b6c955b552451240b · Note