CVE-2025-23023

Anonymous cache poisoning via request headers in Discourse

State: Published
Severity: 8.2 High
Published: Feb 4, 2025
Updated: Feb 12, 2025
Reserved: Jan 10, 2025

Description

Discourse is an open source platform for community discussion. In affected versions an attacker can carefully craft a request with the right request headers to poison the anonymous cache (for example, the cache may have a response with missing preloaded data). This issue only affects anonymous visitors of the site. This problem has been patched in the latest version of Discourse. Users are advised to upgrade. Users unable to upgrade may disable anonymous cache by setting the `DISCOURSE_DISABLE_ANON_CACHE` environment variable to a non-empty value.

Scores

CVSS	Score	Vector	Source
3.1	8.2 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L	GitHub_M

Weaknesses

CWE-346 Origin Validation Error

Affected Products

Product	Versions
discoursediscourse	stable: < 3.3.2Affected tests-passed: < 3.4.0.beta3Affected

References

https://github.com/discourse/discourse/security/advisories/GHSA-5h4h-2f46-r3c7

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