CVE-2021-43794

Published: Dec 1, 2021Modified: Jun 17, 2026

5.3

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Exploitability: 3.9 / Impact: 1.4

Source: security-advisories@github.com (Secondary)

Description

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.

Affected (1)

Products: Discourse: Discourse

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Discourse Discourse	Before 2.7.11

Related CWEs

Externally Controlled Reference to a Resource in Another Sphere

The product uses an externally controlled name or reference that resolves to a resource that is outside of the intended control sphere.

References (4)

https://github.com/discourse/discourse/commit/2da0001965c6d8632d723c46ea5df9f22a1a23f1

Source: security-advisories@github.com

PatchThird Party Advisory

https://github.com/discourse/discourse/security/advisories/GHSA-249g-pc77-65hp

Source: security-advisories@github.com

Third Party Advisory

https://github.com/discourse/discourse/commit/2da0001965c6d8632d723c46ea5df9f22a1a23f1

Source: af854a3a-2127-422b-91ae-364da2661108

PatchThird Party Advisory

https://github.com/discourse/discourse/security/advisories/GHSA-249g-pc77-65hp

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party Advisory

Timeline

No history available yet.