CVE-2022-39356

Name: CVE-2022-39356
Creator: NVD / NIST
Published: 2022-11-02T17:15:17.52+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 0.56%

Last modified Jun 17, 2026

CVE-2022-39356 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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. EPSS estimates a 0.56% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

0.56%

42.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-285

Affected Software

Vendor	Product	Versions	Update
Discourse	Discourse	< 2.8.10	—
Discourse	Discourse	2.9.0	Beta1

References

https://github.com/discourse/discourse/pull/18817Patch, Third Party Advisory
https://github.com/discourse/discourse/security/advisories/GHSA-x8w7-rwmr-w278Third Party Advisory
https://github.com/discourse/discourse/pull/18817Patch, Third Party Advisory
https://github.com/discourse/discourse/security/advisories/GHSA-x8w7-rwmr-w278Third Party Advisory

Timeline

Published: Nov 2, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-39356?

How severe is CVE-2022-39356?

CVE-2022-39356 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.56% probability of exploitation in the next 30 days.

How do I fix CVE-2022-39356?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-39356?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST