Cyber Resilience

CVE-2023-23621

High

Published: 28 January 2023

Published
28 January 2023
Modified
21 November 2024
KEV Added
—
Patch
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CVSS Score v3.1 8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
EPSS Score 0.0040 60.8th percentile
Risk Priority 17 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2023-23621 is a high-severity Inefficient Regular Expression Complexity (CWE-1333) vulnerability in Discourse Discourse. Its CVSS base score is 8.6 (High).

Operationally, ranked in the top 39.2% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

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.…

more

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.

CWE(s)
CWE-1333

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

discourse
discourse
1.1.0, 1.2.0, 1.3.0, 1.4.0, 1.5.0 · ≤ 3.0.1

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References