CVE-2021-41140

Name: CVE-2021-41140
Creator: NVD / NIST
Published: 2021-10-19T18:15:08.03+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 0.90%

Last modified Jun 17, 2026

CVE-2021-41140 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. 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. EPSS estimates a 0.90% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

5.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS Probability

0.90%

55.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Discourse	Discourse Reactions	< 0.2

References

https://github.com/discourse/discourse-reactions/commit/213d90b82fd15c4186ebc290fee18817d9727d0dPatch, Third Party Advisory
https://github.com/discourse/discourse-reactions/security/advisories/GHSA-9358-hwg5-jrmhThird Party Advisory
https://github.com/discourse/discourse-reactions/commit/213d90b82fd15c4186ebc290fee18817d9727d0dPatch, Third Party Advisory
https://github.com/discourse/discourse-reactions/security/advisories/GHSA-9358-hwg5-jrmhThird Party Advisory

Timeline

Published: Oct 19, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-41140?

How severe is CVE-2021-41140?

CVE-2021-41140 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.90% probability of exploitation in the next 30 days.

How do I fix CVE-2021-41140?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-41140?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST