CVE-2023-23621
HIGHDiscourse < 3.0.1 - Regular Expression Denial of Service via User Agent
Title source: llmDescription
Discourse is an open-source discussion platform. Prior to version 3.0.1 on the `stable` branch and version 3.1.0.beta2 on the `beta` and `tests-passed` branches, a malicious user can cause a regular expression denial of service using a carefully crafted user agent. This issue is patched in version 3.0.1 on the `stable` branch and version 3.1.0.beta2 on the `beta` and `tests-passed` branches. There are no known workarounds.
References (3)
Core 3
Core References
Third Party Advisory x_refsource_confirm
https://github.com/discourse/discourse/security/advisories/GHSA-mrfp-54hf-jrcv
Issue Tracking, Patch x_refsource_misc
https://github.com/discourse/discourse/pull/20002
Scores
CVSS v3
8.6
EPSS
0.0087
EPSS Percentile
53.9%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-1333
Status
published
Products (5)
discourse/discourse
1.1.0 beta1 (9 CPE variants)
discourse/discourse
1.2.0 beta1 (9 CPE variants)
discourse/discourse
1.3.0 beta1 (11 CPE variants)
discourse/discourse
1.4.0 beta1 (12 CPE variants)
discourse/discourse
1.5.0 beta1 (9 CPE variants)
Published
Jan 28, 2023
Tracked Since
Feb 18, 2026