CVE-2023-36818: Denial of service via User Custom Sidebar Section Unlimited Link Creation in discourse

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-07-14 · updated 2026-06-17
Weakness: CWE-400

Description

Discourse is an open source discussion platform. In affected versions a request to create or update custom sidebar section can cause a denial of service. This issue has been patched in commit `52b003d915`. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Affected products

discourse: 3.1.0-beta5

References

https://github.com/discourse/discourse/commit/52b003d915761f1581ae2d105f3cbe76df7bf1ff
https://github.com/discourse/discourse/security/advisories/GHSA-gxqx-3q2p-37gm
https://github.com/discourse/discourse/commit/52b003d915761f1581ae2d105f3cbe76df7bf1ff
https://github.com/discourse/discourse/security/advisories/GHSA-gxqx-3q2p-37gm

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