CVE-2021-41140 : What You Need to Know

Discourse-reactions, a plugin for Discourse that allows users to add reactions to posts, has a vulnerability in versions prior to 0.2, where reactions to secure topics and private messages are visible. This CVE addresses the issue by providing a patch in version 0.2.

Understanding CVE-2021-41140

What is CVE-2021-41140?

Discourse-reactions plugin for the Discourse platform allows users to react to posts. In affected versions (< 0.2), reactions to secure topics and private messages are visible.

The Impact of CVE-2021-41140

The vulnerability has a CVSS base score of 5.3 (Medium severity). Exploitation requires low attack complexity and no privileges. It does not impact availability but may expose some confidentiality.

Technical Details of CVE-2021-41140

Vulnerability Description

The issue allows unauthorized access to reactions on secure topics and private messages, violating user privacy.

Affected Systems and Versions

Product: discourse-reactions
Vendor: Discourse
Versions Affected: < 0.2

Exploitation Mechanism

Attackers can view reactions meant for secure topics and private messages without proper authorization.

Mitigation and Prevention

Immediate Steps to Take

Update to version 0.2 of discourse-reactions to apply the patch.
If unable to update, disable the Discourse-reactions plugin through the admin panel.

Long-Term Security Practices

Regularly update plugins and software to ensure the latest security patches are applied.

Patching and Updates

Install security updates promptly to mitigate vulnerabilities.