CVE-2021-43794

Discourse is an open source discussion platform. In affected versions an attacker can poison the cache for anonymous (i.e. not logged in) users, such that the users are shown a JSON blob instead of the HTML page. This can lead to a partial denial-of-service. This issue is patched in the latest stable, beta and tests-passed versions of Discourse.

• CWE-610

• https://github.com/discourse/discourse/commit/2da0001965c6d8632d723c46ea5df9f22a1a23f1Patch, Third Party Advisory
• https://github.com/discourse/discourse/security/advisories/GHSA-249g-pc77-65hpThird Party Advisory
• https://github.com/discourse/discourse/commit/2da0001965c6d8632d723c46ea5df9f22a1a23f1Patch, Third Party Advisory
• https://github.com/discourse/discourse/security/advisories/GHSA-249g-pc77-65hpThird Party Advisory

Published

Dec 1, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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