How to fix CVE-2024-53851?

Within 30 days: Identify affected systems running affected and apply vendor patches as part of regular patch cycle. Vendor patch is available.

Is Discourse affected by CVE-2024-53851?

Organizations using affected should be aware of moderate risk from CVE-2024-53851, a resource exhaustion vulnerability rated CVSS 4.3. Service availability could be impacted. A patch is available and should be applied during regular vulnerability management.

CVE-2024-53851

MEDIUM

2025-02-04 [email protected]

4.3

CVSS 3.1

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:24 vuln.today

Patch Released

Mar 28, 2026 - 18:24 nvd

Patch available

CVE Published

Feb 04, 2025 - 22:15 nvd

MEDIUM 4.3

Description

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.

Analysis

Discourse is an open source platform for community discussion. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity. This Uncontrolled Resource Consumption vulnerability could allow attackers to cause denial of service by exhausting system resources.

Technical Context

This vulnerability is classified as Uncontrolled Resource Consumption (CWE-400), which allows attackers to cause denial of service by exhausting system resources. 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. Affected products include: Discourse.

Affected Products

Discourse.

Remediation

A vendor patch is available. Apply the latest security update as soon as possible. Implement rate limiting, set resource quotas, validate input sizes, use timeouts.

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +0.2

CVSS: +22

POC: 0

CVE-2024-53851 vulnerability details – vuln.today

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CVE-2024-53851

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CVE-2024-53851

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