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Tool Directory

CVE-2023-45131

HighPublished

Unauthenticated access to new private chat messages in Discourse

Published: Oct 16, 2023
Updated: Sep 16, 2024
Assigning CNA: GitHub_M
Evidence observed: Jul 22, 2025

Primary CVSS

7.5/ 10High

nvd · CVSS 3.1

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

EPSS probability estimate

1.8%

Low · next 30 days

Percentile: 77.4%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

Discourse is an open source platform for community discussion. New chat messages can be read by making an unauthenticated POST request to MessageBus. This issue is patched in the 3.1.1 stable and 3.2.0.beta2 versions of Discourse. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Sources

Discourse 3.1.1 - Unauthenticated Chat Message AccessExploit
İbrahimsql · multiple · Jul 22, 2025

Responsible use

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