CVE-2025-23023

HIGH

Discourse < 3.3.2 - Origin Validation Error

Title source: rule

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.

References (1)

[Third Party Advisory] https://github.com/discourse/discourse/security/advisories/GHSA-5h4h-2f46-r3c7

Scores

CVSS v3 8.2

EPSS 0.0012

EPSS Percentile 31.1%

Attack Vector NETWORK

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

Classification

CWE

CWE-346

Status published

Affected Products (1)

discourse/discourse < 3.3.2

Timeline

Published Feb 04, 2025

Tracked Since Feb 18, 2026