What is the CVSS score of CVE-2026-32273?

CVE-2026-32273 has a CVSS 3.1 base score of 5.4 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.0%.

Is there a patch available for CVE-2026-32273?

Yes, a patch is available for CVE-2026-32273. Update the affected software to the latest version immediately.

Discourse CVE-2026-32273

EUVD-2026-17550 MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2026-03-31 GitHub_M

XSS Discourse

5.4

CVSS 3.1 · Vendor: GitHub_M

Severity by source

Vendor (GitHub_M) PRIMARY

5.4 MEDIUM

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

Primary rating from Vendor (GitHub_M) · only source for this CVE.

CVSS VectorVendor: GitHub_M

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Patch available

Apr 16, 2026 - 05:29 EUVD

2026.1.3,2026.3.0,2026.2.2

EUVD ID Assigned

Mar 31, 2026 - 18:16 euvd

EUVD-2026-17550

Analysis Generated

Mar 31, 2026 - 18:16 vuln.today

CVE Published

Mar 31, 2026 - 17:39 nvd

MEDIUM 5.4

DescriptionCVE.org

Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, updating a category description via API is not sanitizing the description string, which can lead to XSS attacks. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.

AnalysisAI

Stored cross-site scripting (XSS) in Discourse category description API endpoints allows authenticated users with category management privileges to inject malicious scripts that execute in the browsers of other users viewing the category. The vulnerability affects Discourse versions 2026.1.0 through 2026.1.2, 2026.2.0 through 2026.2.1, and 2026.3.0-pre-release due to missing input sanitization on category description updates. Vendor-released patches address this in versions 2026.1.3, 2026.2.2, and 2026.3.0; no public exploit code has been identified at time of analysis.

Technical ContextAI

The vulnerability exists in Discourse's category management API endpoint that handles category description updates. The root cause is classified under CWE-79 (Improper Neutralization of Input During Web Page Generation), a classic stored XSS vector. When a user with category management permissions submits a category description via the API, the input string is not properly sanitized or HTML-escaped before being stored in the database and subsequently rendered in user interfaces. This allows attackers to embed HTML/JavaScript payloads that persist and execute whenever other users access the affected category. The affected product is the Discourse discussion platform (cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:*), which is widely deployed as both open-source self-hosted instances and as a SaaS offering.

RemediationAI

Upgrade to patched versions immediately: Discourse 2026.1.3 or later for the 2026.1 branch, 2026.2.2 or later for the 2026.2 branch, or 2026.3.0 or later for the 2026.3 branch. The upstream fix is available in commit 05e3da2a670cfd499649128b6c955b552451240b (https://github.com/discourse/discourse/commit/05e3da2a670cfd499649128b6c955b552451240b), which implements proper input sanitization for category description fields in the API. After patching, audit category descriptions in existing instances to identify and remove any previously injected malicious content. As an interim measure, restrict category management permissions to trusted administrators only and monitor API logs for suspicious category description updates.