CVE-2023-23621
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.87%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.87% probability · 57th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-1333
- Affected
- discourse/discourse
- Source
- security-advisories@github.com
References
- https://github.com/discourse/discourse/commit/6d92c3cbdac431db99a450f360a3048bb3aaf458Patch
- https://github.com/discourse/discourse/pull/20002Issue Tracking, Patch
- https://github.com/discourse/discourse/security/advisories/GHSA-mrfp-54hf-jrcvThird Party Advisory
- https://github.com/discourse/discourse/commit/6d92c3cbdac431db99a450f360a3048bb3aaf458Patch
- https://github.com/discourse/discourse/pull/20002Issue Tracking, Patch
- https://github.com/discourse/discourse/security/advisories/GHSA-mrfp-54hf-jrcvThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.