CVE-2022-21684

User can bypass approval when invited to Discourse

Severity Score

8.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Discourse is an open source discussion platform. Versions prior to 2.7.13 in `stable`, 2.8.0.beta11 in `beta`, and 2.8.0.beta11 in `tests-passed` allow some users to log in to a community before they should be able to do so. A user invited via email to a forum with `must_approve_users` enabled is going to be automatically logged in, bypassing the check that does not allow unapproved users to sign in. They will be able to do everything an approved user can do. If they logout, they cannot log back in. This issue is patched in the `stable` version 2.7.13, `beta` version 2.8.0.beta11, and `tests-passed` version 2.8.0.beta11. One may disable invites as a workaround. Administrators can increase `min_trust_level_to_allow_invite` to reduce the attack surface to more trusted users.

Discourse es una plataforma de debate de código abierto. Las versiones anteriores a 2.7.13 en "stable", a la 2.8.0.beta11 en "beta" y a la 2.8.0.beta11 en "tests-passed" permiten a algunos usuarios iniciar sesión en una comunidad antes de lo que deberían. Un usuario invitado por medio de un correo electrónico a un foro con "must_approve_users" habilitado va a entrar automáticamente, omitiendo la comprobación que no permite a usuarios no aprobados entrar. Podrán hacer todo lo que un usuario aprobado puede hacer. Si cierran la sesión, no podrán volver a entrar. Este problema está parcheado en las versiones "stable" 2.7.13, "beta" 2.8.0.beta11 y "tests-passed" 2.8.0.beta11. Pueden deshabilitarse las invitaciones como solución. Los administradores pueden aumentar "min_trust_level_to_allow_invite" para reducir la superficie de ataque a los usuarios de mayor confianza

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

Single

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-11-16 CVE Reserved
2022-01-13 CVE Published
2023-09-04 EPSS Updated
2024-08-03 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-287: Improper Authentication

CAPEC

References (3)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC
https://github.com/discourse/discourse/commit/584c6a2e8bc705072b09a9c4b55126d6f8ed4ad2	2023-07-24
https://github.com/discourse/discourse/security/advisories/GHSA-p63q-jp48-h8xh	2023-07-24
https://meta.discourse.org/t/invite-redemption-allowed-user-to-access-forum-before-approval/214328	2023-07-24

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Discourse Search vendor "Discourse"		Discourse Search vendor "Discourse" for product "Discourse"				< 2.7.13 Search vendor "Discourse" for product "Discourse" and version " < 2.7.13"		-		Affected
Discourse Search vendor "Discourse"		Discourse Search vendor "Discourse" for product "Discourse"				2.8.0 Search vendor "Discourse" for product "Discourse" and version "2.8.0"		beta1		Affected
Discourse Search vendor "Discourse"		Discourse Search vendor "Discourse" for product "Discourse"				2.8.0 Search vendor "Discourse" for product "Discourse" and version "2.8.0"		beta10		Affected
Discourse Search vendor "Discourse"		Discourse Search vendor "Discourse" for product "Discourse"				2.8.0 Search vendor "Discourse" for product "Discourse" and version "2.8.0"		beta2		Affected
Discourse Search vendor "Discourse"		Discourse Search vendor "Discourse" for product "Discourse"				2.8.0 Search vendor "Discourse" for product "Discourse" and version "2.8.0"		beta3		Affected
Discourse Search vendor "Discourse"		Discourse Search vendor "Discourse" for product "Discourse"				2.8.0 Search vendor "Discourse" for product "Discourse" and version "2.8.0"		beta4		Affected
Discourse Search vendor "Discourse"		Discourse Search vendor "Discourse" for product "Discourse"				2.8.0 Search vendor "Discourse" for product "Discourse" and version "2.8.0"		beta5		Affected
Discourse Search vendor "Discourse"		Discourse Search vendor "Discourse" for product "Discourse"				2.8.0 Search vendor "Discourse" for product "Discourse" and version "2.8.0"		beta6		Affected
Discourse Search vendor "Discourse"		Discourse Search vendor "Discourse" for product "Discourse"				2.8.0 Search vendor "Discourse" for product "Discourse" and version "2.8.0"		beta7		Affected
Discourse Search vendor "Discourse"		Discourse Search vendor "Discourse" for product "Discourse"				2.8.0 Search vendor "Discourse" for product "Discourse" and version "2.8.0"		beta8		Affected
Discourse Search vendor "Discourse"		Discourse Search vendor "Discourse" for product "Discourse"				2.8.0 Search vendor "Discourse" for product "Discourse" and version "2.8.0"		beta9		Affected