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CVE-2026-33514

Discourse: Information Disclosure in Form Template API Due to Missing Authorization

Published: May 19, 2026Updated: Jun 1, 2026 Sources: CVE List NVDCWE-862
NVD MITRE
4.3CVSSMEDIUM
EPSS Score
0.3%
Top 84.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

Discourse is an open-source discussion platform. In versions prior to 2026.1.4, 2026.3.1, 2026.4.1 and 2026.5.0-latest.1, an authenticated user on a Discourse instance with the form templates feature enabled can read the name and structured content of form templates that are intended exclusively for categories they are not authorized to access. Impact is limited to disclosure of site configuration metadata. This issue has been fixed in versions 2026.1.4, 2026.3.1, 2026.4.1 and 2026.5.0-latest.1.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:LI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-862

Affected Products

discoursediscourseWeb & CMS Plugins
discoursecommercialUSWeb & CMS Pluginsaka discourse.org

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
View detailed technique mapping

References

https://github.com/discourse/discourse/security/advisories/GHSA-w6g7-p2p9-2m5h
github.com
https://github.com/discourse/discourse/commit/ae5c9570fb918442c4d96abc83c1e7e169909b02
github.com

Timeline

Published
May 19, 2026
Last Updated
Jun 1, 2026

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