Skip to content

Group private messages title and participating users are leaked to users that do not have access.

High
tgxworld published GHSA-vm3x-w6jm-j9vv Sep 20, 2021

Package

Discourse (Discourse)

Affected versions

tests-passed = ddb4583

Patched versions

tests-passed > 27bad28

Description

Impact

This affects Discourse instances running against the tests-passed branch and deployed between 15 September 2021 02:44 AM UTC to 15 September 2021 05:16 AM UTC.

Any private message that includes a group had its title and participating user exposed to users that do not have access to the private messages. However, access control for the private messages was not compromised as users were not able to view the posts in the leaked private message despite seeing it in their inbox.

Patches

The problematic commit was reverted around 32 minutes after it was made. Users are encouraged to upgrade to the latest commit if they are running Discourse against the tests-passed branch.

Severity

High
7.5
/ 10

CVSS base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVE ID

CVE-2021-41082

Weaknesses

No CWEs