VULNERABILITY INTELLIGENCE

CVE-2021-43794

CVSS score5.3 MEDIUM
EPSS probability1.05%
CISA KEVNot currently listed
Published2021-12-01
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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.

Weakness classification

  • CWE-610: Externally Controlled Reference to a Resource in Another Sphere

Primary references