Cross-Site Scripting Vulnerability in Discourse Discussion Platform
CVE-2026-32243

5.3MEDIUM

Key Information:

Vendor

Discourse
Status
Discourse
Vendor
CVE Published:
31 March 2026

What is CVE-2026-32243?

Discourse, a popular open-source discussion platform, is affected by a cross-site scripting vulnerability that allows attackers to inject arbitrary HTML and JavaScript via specially crafted conversation titles. Users who create shared AI conversations within the affected versions risk exposing their sessions or performing unauthorized actions. This critical issue has been addressed in subsequent patches, emphasizing the need for users to upgrade to the secure versions to mitigate potential threats.

Affected Version(s)

discourse >= 2026.1.0-latest, < 2026.1.3 < 2026.1.0-latest, 2026.1.3

discourse >= 2026.2.0-latest, < 2026.2.2 < 2026.2.0-latest, 2026.2.2

discourse >= 2026.3.0-latest, < 2026.3.0 < 2026.3.0-latest, 2026.3.0

References

https://github.com/discourse/discourse/security/advisorie...
x_refsource_CONFIRM
https://github.com/discourse/discourse/commit/cac7d618a56...
x_refsource_MISC

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.