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OpenAdvisories
High · 8.6 CVE-2023-23621 EUVD-2023-27715

Discourse vulnerable to ReDoS in user agent parsing

Published Jan 27, 2023 · Updated Mar 10, 2025 · Assigned by GitHub_M

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.

Affected products

VendorProductAffectedFixed
discourse discourse < 3.0.1, = 3.1.0.beta1 —

References