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Vulnerability record · CVE-2022-39356 · published 2 November 2022

CVE-2022-39356: Discourse improper authorization vulnerability

Discourse · Discourse

Discourse is a platform for community discussion. Users who receive an invitation link that is not scoped to a single email address can enter any non-admin user's email and gain access to their account when accepting the invitation. All users should upgrade to the latest version. A workaround is temporarily disabling invitations with `SiteSetting.max_invites_per_day = 0` or scope them to individual email addresses.

8.8 CVSS 3.1 High EPSS 0.61% · top 53.2% CWE-285 · Improper authorization
8.8CVSS 3.1 base score
0.61%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

Discourse is a platform for community discussion. Users who receive an invitation link that is not scoped to a single email address can enter any non-admin user's email and gain access to their account when accepting the invitation. All users should upgrade to the latest version. A workaround is temporarily disabling invitations with `SiteSetting.max_invites_per_day = 0` or scope them to individual email addresses.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/discourse/discourse/pull/18817 PatchThird Party Advisory
https://github.com/discourse/discourse/security/advisories/GHSA-x8w7-rwmr-w278 Third Party Advisory
https://github.com/discourse/discourse/pull/18817 PatchThird Party Advisory
https://github.com/discourse/discourse/security/advisories/GHSA-x8w7-rwmr-w278 Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2022-39356), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.