CVE-2022-23641mediumCWE-835

CVE-2022-23641: medium-severity vulnerability in discourse

Denial of Service in Discourse

Published · Updated

Follow this CVE+ Monitor discourse

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 6.5epss 1.2%
In short

Discourse users can crash the platform by posting a streaming URL that causes an infinite loop in the background processing system, consuming all available memory. This allows anyone to disrupt service for all users.

Technical detail

CWE-835 infinite loop vulnerability in Onebox parsing triggered by malicious streaming URLs in user posts. The background job processing creates unbounded memory consumption leading to DoS. Attack requires only standard user privileges to post content; patched in versions 2.8.1 (stable), 2.9.0.beta2 (beta/tests-passed).

Summary generated and translated by AI from the official description.
Discourse is an open source discussion platform. In versions prior to 2.8.1 in the `stable` branch, 2.9.0.beta2 in the `beta` branch, and 2.9.0.beta2 in the `tests-passed` branch, users can trigger a Denial of Service attack by posting a streaming URL. Parsing Oneboxes in the background job trigger an infinite loop, which cause memory leaks. This issue is patched in version 2.8.1 of the `stable` branch, 2.9.0.beta2 of the `beta` branch, and 2.9.0.beta2 of the `tests-passed` branch. As a workaround, disable onebox in admin panel completely or specify allow list of domains that will be oneboxed.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected products
discourse · discourse
Related CVEs — discourse

In the same product, most dangerous first.

CVE-2024-53991HIGHPotential Backup file leaked via Nginx in DiscourseEPSS 29.9%CVE-2021-41163CRITICALRCE via malicious SNS subscription payloadEPSS 19.8%CVE-2023-45131HIGHUnauthenticated access to new private chat messages in DiscourseEPSS 4.0%CVE-2026-28227LOWDiscourse Vulnerable to Unauthorized Topic Creation in Staff-Only Categories via Topic Timer publish_to_categoryEPSS 3.2%CVE-2022-36066CRITICALDiscourse vulnerable to RCE via admins uploading maliciously zipped fileEPSS 2.1%CVE-2024-47773HIGHAnonymous cache poisoning via XHR requests in DiscourseEPSS 1.8%