CVE-2021-32788 Post creator of a whisper post can be revealed to non-staff users in Discourse
Attackers can reveal the identity of whisper post creators to non-staff users, exposing private user information in Discourse forums.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-32788?
CVE-2021-32788 is a medium-severity vulnerability in Discourse Discourse, published on 27 Jul 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Discourse is an open source discussion platform. In versions prior to 2.7.7 there are two bugs which led to the post creator of a whisper post being revealed to non-staff users. 1: Staff users that creates a whisper post in a personal message is revealed to non-staff participants of the personal message even though the whisper post cannot be seen by them. 2: When a whisper post is before the last post in a post stream, deleting the last post will result in the creator of the whisper post to be revealed to non-staff users as the last poster of the topic.
Weakness: CWE-668
Which versions are affected by CVE-2021-32788?
1 open source package ship an affected version, including discourse. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
discourse Bitnami | All versions | 2.7.7 |
Products include Discourse Discourse.
How do I fix CVE-2021-32788?
Upgrade discourse to 2.7.7 or later.
Is CVE-2021-32788 being exploited?
There is no known exploitation of CVE-2021-32788 in the wild and no public exploit code.
Other vulnerabilities in Discourse Discourse
- CVE-2021-41163 RCE via malicious SNS subscription payload
- CVE-2022-36066 Discourse vulnerable to RCE via admins uploading maliciously zipped file
- CVE-2022-39356 Discourse user account takeover via email and invite link
- CVE-2023-22468 Discourse vulnerable to Cross-site Scripting in local oneboxes
- CVE-2026-27934 Discourse leaks private topic title and post excerpt via user action API endpoint
Sources
Also known as BIT-discourse-2021-32788, GHSA-v6xg-q577-vc92.