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6.5
CVE-2023-25167: Regular expression denial of service via installing themes via git in discourse
CVE-2023-25167 · published 3 years ago
Summary
Discourse is an open source discussion platform. In affected versions a malicious user can cause a regular expression denial of service using a carefully crafted git URL. This issue is patched in the latest stable, beta and tests-passed versions of Discourse. Users are advised to upgrade. There are ...
What to do
- Update discourse discourse to version 3.0.1 or later.
Affected software
| Vendor | Product | Affected versions |
|---|---|---|
| discourse | discourse |
< 3.0.1 3.1.0 cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:* |
Original advisory text
Regular expression denial of service via installing themes via git in discourse
Discourse is an open source discussion platform. In affected versions a malicious user can cause a regular expression denial of service using a carefully crafted git URL. This issue is patched in the latest stable, beta and tests-passed versions of Discourse. Users are advised to upgrade. There are no known workarounds for this issue.
References
- https://github.com/discourse/discourse/security/advisories/GHSA-4w55-w26q-r35w Vendor Advisory
- https://github.com/discourse/discourse/commit/ec4c30270887366dc28788bc4ab8a22a09... Patch
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/25xxx/CVE-2023-25167... Vendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2023-25167 Vendor Advisory
Internet-facing
60 days
Internal
At next upgrade
- Not known to be exploited
- Needs hands-on effort to exploit
- Gives an attacker partial control
Severity
6.5
Medium
Type
CWE-1333Inefficient Regular Expression Complexity (ReDoS)
Timeline
Published8 Feb 2023
Updated4 Nov 2026
First seen29 Sep 2026
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