CVE-2021-32788

Name: CVE-2021-32788
Creator: NVD / NIST
Published: 2021-07-27T22:15:07.597+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.3/10EPSS 0.89%

Last modified Jun 17, 2026

CVE-2021-32788 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. Discourse is an open source discussion platform. In versions prior to 2.7.7 there are two bugs which led to the post creator of a whisper post being revealed to non-staff users. EPSS estimates a 0.89% chance of exploitation in the next 30 days.

Description

Discourse is an open source discussion platform. In versions prior to 2.7.7 there are two bugs which led to the post creator of a whisper post being revealed to non-staff users. 1: Staff users that creates a whisper post in a personal message is revealed to non-staff participants of the personal message even though the whisper post cannot be seen by them. 2: When a whisper post is before the last post in a post stream, deleting the last post will result in the creator of the whisper post to be revealed to non-staff users as the last poster of the topic.

Metrics

CVSS 3.1

4.3/10

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

EPSS Probability

0.89%

54.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Discourse	Discourse	< 2.7.7

References

https://github.com/discourse/discourse/commit/680024f9071b7696e5a444a58791016c6dc1f1e5Patch, Third Party Advisory
https://github.com/discourse/discourse/commit/dbdf61196d9e964e8823793d2e7f856595fea4d9Patch, Third Party Advisory
https://github.com/discourse/discourse/security/advisories/GHSA-v6xg-q577-vc92Third Party Advisory
https://github.com/discourse/discourse/commit/680024f9071b7696e5a444a58791016c6dc1f1e5Patch, Third Party Advisory
https://github.com/discourse/discourse/commit/dbdf61196d9e964e8823793d2e7f856595fea4d9Patch, Third Party Advisory
https://github.com/discourse/discourse/security/advisories/GHSA-v6xg-q577-vc92Third Party Advisory

Timeline

Published: Jul 27, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-32788?

How severe is CVE-2021-32788?

CVE-2021-32788 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 0.89% probability of exploitation in the next 30 days.

How do I fix CVE-2021-32788?

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-2021-32788?

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

Scan your code now

Source: NVD / NIST