CVE-2023-48297 Discourse vulnerable to unlimited mentioned users in message serializer
Attackers can cause denial of service by triggering excessive user expansion in chat mentions, impacting Discourse forum availability.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-48297?
CVE-2023-48297 is a high-severity denial of service vulnerability in Discourse Discourse, published on 12 Jan 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Discourse is a platform for community discussion. The message serializer uses the full list of expanded chat mentions (@all and @here) which can lead to a very long array of users. This issue was patched in versions 3.1.4 and beta 3.2.0.beta5.
Weakness: CWE-400
Which versions are affected by CVE-2023-48297?
1 open source package ship an affected version, including discourse. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
discourse Bitnami | All versions | 3.1.4 |
Products include Discourse Discourse.
How do I fix CVE-2023-48297?
Upgrade discourse to 3.1.4 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-2023-48297 being exploited?
There is no known exploitation of CVE-2023-48297 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-2023-48297, GHSA-hf2v-r5xm-8p37.