CVE-2023-30606 Multisite denial of service through unsanitized dynamic dispatch to SiteSetting in Discourse
Administrators can trigger denial of service in multisite Discourse instances by calling unsanitized SiteSetting methods, affecting the entire cluster.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2023-30606?
CVE-2023-30606 is a medium-severity denial of service vulnerability in Discourse Discourse, published on 18 Apr 2023. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
Discourse is an open source platform for community discussion. In affected versions a user logged as an administrator can call arbitrary methods on the `SiteSetting` class, notably `#clear_cache!` and `#notify_changed!`, which when done on a multisite instance, can affect the entire cluster resulting in a denial of service. Users not running in multisite environments are not affected. This issue is patched in the latest stable, beta and tests-passed versions of Discourse. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Weakness: CWE-732
Which versions are affected by CVE-2023-30606?
1 open source package ship an affected version, including discourse. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
discourse Bitnami | All versions to 3.0.1 | 3.1.0 |
Products include Discourse Discourse.
How do I fix CVE-2023-30606?
Upgrade discourse to 3.1.0 or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2023-30606 being exploited?
There is no known exploitation of CVE-2023-30606 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-2023-30606, GHSA-jj93-w3mv-3jvv.