CVE-2023-30606: Multisite denial of service through unsanitized dynamic dispatch to SiteSetting in Discourse
First published: Tue Apr 18 2023(Updated: )
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.
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Discourse Discourse | <=3.0.1 | |
| Discourse Discourse | <3.1.0 | |
| Discourse Discourse | =3.1.0-beta1 | |
| Discourse Discourse | =3.1.0-beta2 |
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Frequently Asked Questions
What is CVE-2023-30606?
CVE-2023-30606 is a vulnerability in Discourse that allows an administrator user to call arbitrary methods on the `SiteSetting` class, potentially affecting the entire cluster.
How does CVE-2023-30606 affect Discourse?
CVE-2023-30606 allows an administrator user to call arbitrary methods on the `SiteSetting` class, which can impact the entire cluster in a multisite instance of Discourse.
What is the severity of CVE-2023-30606?
The severity of CVE-2023-30606 is medium with a CVSS score of 4.9.
Which versions of Discourse are affected by CVE-2023-30606?
Discourse versions up to and including 3.0.1 stable, and up to but excluding 3.1.0 beta are affected by CVE-2023-30606.
How can I fix CVE-2023-30606?
To fix CVE-2023-30606, it is recommended to update to a patched version of Discourse.
- collector/nvd-index
- agent/type
- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- agent/author
- agent/last-modified-date
- agent/references
- agent/severity
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- vendor/discourse
- canonical/discourse discourse
- version/discourse discourse/3.0.1
- version/discourse discourse/3.1.0-beta1
- version/discourse discourse/3.1.0-beta2