What is CVE-2024-53851?

CVE-2024-53851 is a medium-severity vulnerability in Discourse, classified under Uncontrolled Resource Consumption. CVSS score: 4.3/10. Published 2025-02-04.

How severe is CVE-2024-53851?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Resource exhaustion in Discourse

CVE-2024-53851

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 class: DoS (Denial of Service)

EPSS: 0.004 (36.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.

Affected products

Discourse — versions beta: <= 3.4.0.beta3, 3.4.0, stable: <= 3.3.2

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

References

security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory)
security-advisories@github.com (Patch, x_refsource_MISC)

Frequently asked questions

What is CVE-2024-53851?: CVE-2024-53851 is a medium-severity vulnerability in Discourse, classified under Uncontrolled Resource Consumption. CVSS score: 4.3/10. Published 2025-02-04.
How severe is CVE-2024-53851?: Medium severity. CVSS v3 base score is 4.3 out of 10.