CVE-2022-31096Network attack vector

Restricted-content access via unchecked invite redemption

Published Jun 27, 2022 · Updated Apr 23, 2025

Improper authorization in Discourse before 2.8.5 stable and 2.9.0.beta6 beta allows remote authenticated users to bypass invite restrictions. The invite redemption flow fails to compare the logged-in account's email with an invite's fixed address or permitted domain before applying group memberships. A valid account and a restricted invite are required; redemption can add the account to private groups and expose group-restricted content.

CVSS severity5.7
Medium
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authorization in Discourse before 2.8.5 stable and 2.9.0.beta6 beta allows remote authenticated users to bypass invite restrictions. The invite redemption flow fails to compare the logged-in account's email with an invite's fixed address or permitted domain before applying group memberships. A valid account and a restricted invite are required; redemption can add the account to private groups and expose group-restricted content.

The record

CVE
CVE-2022-31096
Published
Jun 27, 2022
Updated
Apr 23, 2025
Vendor
Discourse
Product
Discourse
Classifications
CWE-281, T1098
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 27, 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

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Is a vulnerable build present?

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

  1. Affected versionversion=< 2.8.5; stable branch
  2. Affected versionversion=< 2.9.0.beta6; beta brach

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Discourse · Discourseversion=< 2.8.5; stable branch; version=< 2.9.0.beta6; beta brach

Published CVSS scores

5.7GitHub CNACVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/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-281Improper Preservation of Permissions
T1098Account Manipulation

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

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Your stack

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