CVE-2021-43793

Name: CVE-2021-43793
Creator: NVD / NIST
Published: 2021-12-01T20:15:08.587+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.3/10EPSS 0.76%

Last modified Jun 17, 2026

CVE-2021-43793 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. Discourse is an open source discussion platform. In affected versions a vulnerability in the Polls feature allowed users to vote multiple times in a single-option poll. EPSS estimates a 0.76% chance of exploitation in the next 30 days.

Description

Discourse is an open source discussion platform. In affected versions a vulnerability in the Polls feature allowed users to vote multiple times in a single-option poll. The problem is patched in the latest tests-passed, beta and stable versions of Discourse

Metrics

CVSS 3.1

4.3/10

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

EPSS Probability

0.76%

50.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-269

Affected Software

Vendor	Product	Versions	Update
Discourse	Discourse	< 2.7.11	—
Discourse	Discourse	2.8.0	Beta1

References

https://github.com/discourse/discourse/commit/0c6b9df77bac9c6f7c7e2eadf6fe100064afdeabPatch, Third Party Advisory
https://github.com/discourse/discourse/commit/1d0faedfbc3a8b77b971dc70d25e30791dbb6e0bPatch, Third Party Advisory
https://github.com/discourse/discourse/security/advisories/GHSA-jq7h-44vc-h6qxThird Party Advisory
https://github.com/discourse/discourse/commit/0c6b9df77bac9c6f7c7e2eadf6fe100064afdeabPatch, Third Party Advisory
https://github.com/discourse/discourse/commit/1d0faedfbc3a8b77b971dc70d25e30791dbb6e0bPatch, Third Party Advisory
https://github.com/discourse/discourse/security/advisories/GHSA-jq7h-44vc-h6qxThird Party Advisory

Timeline

Published: Dec 1, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-43793?

How severe is CVE-2021-43793?

CVE-2021-43793 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 0.76% probability of exploitation in the next 30 days.

How do I fix CVE-2021-43793?

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-2021-43793?

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

Scan your code now

Source: NVD / NIST