CVE-2025-23023CWE-346

Anonymous cache poisoning via request headers in Discourse

High · published February 4, 2025

CVSS v3.1
8.2
EPSS
0%
Percentile
16.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.2 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
CVSS v4.0
Not supplied
EPSS
0.00257 · 16.4th percentile
Weakness
CWE-346 · Origin Validation Error
Published
2025-02-04T20:48Z
EPSS history
Timeline
  • 04 FEB 20:48Z
    Anonymous cache poisoning via request headers in Discourse
    cvelistv5