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TI-2021-17979 Aliases CVE-2021-41140

Reactions leak for secure category topics and private messages

Priority LOW 26CWE-668Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
Low · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-668 and the CVSS impact.

Summary

Discourse-reactions is a plugin for the Discourse platform that allows user to add their reactions to the post. In affected versions reactions given by user to secure topics and private messages are visible. This issue is patched in version 0.2 of discourse-reaction. Users who are unable to update are advised to disable the Discourse-reactions plugin in admin panel.

Why it matters now

EPSS 0.00934 60th percentileScored 2026-11-07
Fix Fixed discourse-reactions (discourse): 0.2

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
discoursediscourse-reactionsbefore 0.20.2Patch availableCNA
  • discourse-reactions Vendordiscourse Affected before 0.2 Fixed in 0.2 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:discourse:discourse_reactions:*:*:*:*:*:discourse:*:*before 0.2Vulnerablediscourse
  • cpe:2.3:a:discourse:discourse_reactions:*:*:*:*:*:discourse:*:* Versions before 0.2 Vulnerable ·discourse

Remediation

  • Fix · CNA discourse-reactions (discourse) Fixed in 0.2

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-41140

References

Patch 1

Advisory 1

  • TI-2023-26763 Reaction data for user notifications exposed in Discourse-reactions CVSS 3.1LOW 3.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences