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Anonymous user cache poisoning via development-mode header

Moderate
jomaxro published GHSA-249g-pc77-65hp Dec 1, 2021

Package

No package listed

Affected versions

stable <= 2.7.10; beta,tests-passed <= 2.8.0.beta8;

Patched versions

stable >= 2.7.11; beta,tests-passed >= 2.8.0.beta9;

Description

Impact

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.

Patches

This issue is patched in the latest stable, beta and tests-passed versions of Discourse.

Severity

Moderate
5.3
/ 10

CVSS base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CVE ID

CVE-2021-43794

Weaknesses

No CWEs