CVE-2021-32788

Post creator of a whisper post can be revealed to non-staff users in Discourse

MEDIUM
4.3
CVSS Score
Published: July 27, 2021 at 09:40 PM UTC
Updated: June 17, 2026 at 03:53 AM UTC
1 product affected across 1 vendorDiscourse

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Severity
MEDIUM4.3
Exploit prediction
EPSS 0.9%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 2.7.7
Affected range stops below 2.7.7, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

CVSS

4.3MEDIUMGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-668

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