CVE-2022-24866: Exposure of Sensitive Information to an Unauthorized Actor in Discourse Assign

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-04-26 · updated 2026-06-17
Weakness: CWE-200

Description

Discourse Assign is a plugin for assigning users to a topic in Discourse, an open-source messaging platform. Prior to version 1.0.1, the UserBookmarkSerializer serialized the whole User / Group object, which leaked some private information. The data was only being serialized to people who could view assignment info, which is limited to staff by default. For the vast majority of sites, this data was only leaked to trusted staff member, but for sites with assign features enabled publicly, the data was accessible to more people than just staff. Version 1.0.1 contains a patch. There are currently no known workarounds.

Affected products

discourse-assign: before 1.0.1 — fixed in 1.0.1

How to fix

Upgrade to a fixed version: discourse-assign 1.0.1. Check the vendor advisory for mitigations.

References

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