CVE-2022-31095Network attack vector

Message disclosure via missing channel access check

Published Jun 21, 2022 · Updated Apr 23, 2025

Improper access control in Discourse Chat before 0.4 allows remote authenticated users to read messages from inaccessible channels. The chat message lookup endpoint retrieves a message by attacker-supplied ID without verifying that the requester can access its channel. Exploitation requires a valid account and knowledge of the target message ID, and it discloses message content, primarily from direct-message channels.

CVSS severity6.5
Medium
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Improper access control in Discourse Chat before 0.4 allows remote authenticated users to read messages from inaccessible channels. The chat message lookup endpoint retrieves a message by attacker-supplied ID without verifying that the requester can access its channel. Exploitation requires a valid account and knowledge of the target message ID, and it discloses message content, primarily from direct-message channels.

The record

CVE
CVE-2022-31095
Published
Jun 21, 2022
Updated
Apr 23, 2025
Vendor
Discourse
Product
Discourse Chat
Classifications
CWE-284, CWE-200, CWE-862, T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 21, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Discourse · Discourse Chatversion=< 0.4

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
6.5Discourse GitHub Security AdvisoryCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
4.0NIST NVDAV:N/AC:L/Au:S/C:P/I:N/A:N
4.3GitHub CNA CVE recordCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-284Improper Access Control
CWE-200Exposure of Sensitive Information to an Unauthorized Actor
CWE-862Missing Authorization
T1213Data from Information Repositories

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo