CVE-2023-36818 Denial of service via User Custom Sidebar Section Unlimited Link Creation in discourse
Attackers can cause denial of service in Discourse by creating unlimited links in custom sidebar sections, requiring an upgrade to fix.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-36818?
CVE-2023-36818 is a medium-severity denial of service vulnerability in Discourse Discourse, published on 14 Jul 2023. 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 affected versions a request to create or update custom sidebar section can cause a denial of service. This issue has been patched in commit `52b003d915`. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Weakness: CWE-400
Which versions are affected by CVE-2023-36818?
1 open source package ship an affected version, including discourse. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
discourse Bitnami | From 3.1.0-beta5 to 3.1.0-beta5 | None |
Products include Discourse Discourse.
How do I fix CVE-2023-36818?
No fix has been published for CVE-2023-36818 yet. Limit exposure of the affected software until one is available.
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-2023-36818 being exploited?
There is no known exploitation of CVE-2023-36818 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-2023-36818, GHSA-gxqx-3q2p-37gm.