Discourse Authenticated Inline Onebox URL Count Abuse DoS
CVE-2024-53851 Published on February 4, 2025
Partial denial of service via inline oneboxes in Discourse
Discourse is an open source platform for community discussion. In affected versions the endpoint for generating inline oneboxes for URLs wasn't enforcing limits on the number of URLs that it accepted, allowing a malicious user to inflict denial of service on some parts of the app. This vulnerability is only exploitable by authenticated users. This issue has been patched in the latest stable, beta and tests-passed versions of Discourse. Users are advised to upgrade. Users unable to upgrade should turn off the `enable inline onebox on all domains` site setting and remove all entries from the `allowed inline onebox domains` site setting.
Vulnerability Analysis
CVE-2024-53851 can be exploited with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a small impact on availability.
Weakness Type
What is a Resource Exhaustion Vulnerability?
The software does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.
CVE-2024-53851 has been classified to as a Resource Exhaustion vulnerability or weakness.
Products Associated with CVE-2024-53851
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Affected Versions
discourse:- Version stable: <= 3.3.2 is affected.
- Version beta: <= 3.4.0.beta3 is affected.
- Version tests-passed: <= 3.4.0.beta3 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.