CVE-2024-31219: Discourse-reactions' reaction data and public topic whisper content exposed on reactions given user activity page

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-04-15 · updated 2026-06-17
Weakness: CWE-200

Description

Discourse-reactions is a plugin that allows user to add their reactions to the post. When whispers are enabled on a site via `whispers_allowed_groups` and reactions are made on whispers on public topics, the contents of the whisper and the reaction data are shown on the `/u/:username/activity/reactions` endpoint.

Affected products

discourse-reactions: before 0.5

References

https://github.com/discourse/discourse-reactions/commit/6a5a8dacd7e5cbbbbe7d2288b1df9c1062994dbe
https://github.com/discourse/discourse-reactions/security/advisories/GHSA-7cqc-5xrw-xh67
https://github.com/discourse/discourse-reactions/commit/6a5a8dacd7e5cbbbbe7d2288b1df9c1062994dbe
https://github.com/discourse/discourse-reactions/security/advisories/GHSA-7cqc-5xrw-xh67

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