CVE-2023-37904

Discourse Race Condition in Accept Invite

LOW
3.1
CVSS Score
Published: July 28, 2023 at 03:09 PM UTC
Updated: June 17, 2026 at 06:08 AM UTC
1 product affected across 1 vendorDiscourse

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Severity
LOW3.1
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

Discourse is an open source discussion platform. Prior to version 3.0.6 of the `stable` branch and version 3.1.0.beta7 of the `beta` and `tests-passed` branches, more users than permitted could be created from invite links. The issue is patched in version 3.0.6 of the `stable` branch and version 3.1.0.beta7 of the `beta` and `tests-passed` branches. As a workaround, use restrict to email address invites.

Affected

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

v < 3.0.6v < 3.1.0.beta71.1.0 beta11.1.0 beta21.1.0 beta31.1.0 beta41.1.0 beta51.1.0 beta61.1.0 beta6b1.1.0 beta71.1.0 beta81.2.0 beta11.2.0 beta21.2.0 beta31.2.0 beta41.2.0 beta51.2.0 beta61.2.0 beta71.2.0 beta81.2.0 beta91.3.0 beta11.3.0 beta101.3.0 beta111.3.0 beta21.3.0 beta31.3.0 beta41.3.0 beta51.3.0 beta61.3.0 beta71.3.0 beta81.3.0 beta91.4.0 beta11.4.0 beta101.4.0 beta111.4.0 beta121.4.0 beta21.4.0 beta31.4.0 beta41.4.0 beta51.4.0 beta61.4.0 beta71.4.0 beta81.4.0 beta91.5.0 beta11.5.0 beta101.5.0 beta111.5.0 beta121.5.0 beta131.5.0 beta13b1.5.0 beta141.5.0 beta21.5.0 beta31.5.0 beta41.5.0 beta51.5.0 beta61.5.0 beta71.5.0 beta81.5.0 beta91.6.0 beta11.6.0 beta101.6.0 beta111.6.0 beta121.6.0 beta21.6.0 beta31.6.0 beta41.6.0 beta51.6.0 beta61.6.0 beta71.6.0 beta81.6.0 beta91.7.0 beta11.7.0 beta101.7.0 beta111.7.0 beta21.7.0 beta31.7.0 beta41.7.0 beta51.7.0 beta61.7.0 beta71.7.0 beta81.7.0 beta91.8.0 beta11.8.0 beta101.8.0 beta111.8.0 beta121.8.0 beta131.8.0 beta21.8.0 beta31.8.0 beta41.8.0 beta51.8.0 beta61.8.0 beta71.8.0 beta81.8.0 beta91.9.0 beta11.9.0 beta101.9.0 beta111.9.0 beta121.9.0 beta131.9.0 beta141.9.0 beta151.9.0 beta161.9.0 beta171.9.0 beta21.9.0 beta31.9.0 beta41.9.0 beta51.9.0 beta61.9.0 beta71.9.0 beta81.9.0 beta92.0.0 beta12.0.0 beta102.0.0 beta22.0.0 beta32.0.0 beta42.0.0 beta52.0.0 beta62.0.0 beta72.0.0 beta82.0.0 beta92.1.0 beta12.1.0 beta22.1.0 beta32.1.0 beta42.1.0 beta52.1.0 beta62.2.0 beta12.2.0 beta102.2.0 beta22.2.0 beta32.2.0 beta42.2.0 beta52.2.0 beta62.2.0 beta72.2.0 beta82.2.0 beta92.3.0 beta12.3.0 beta102.3.0 beta112.3.0 beta22.3.0 beta32.3.0 beta42.3.0 beta52.3.0 beta62.3.0 beta72.3.0 beta82.3.0 beta92.4.0 beta12.4.0 beta102.4.0 beta112.4.0 beta22.4.0 beta32.4.0 beta42.4.0 beta52.4.0 beta62.4.0 beta72.4.0 beta82.4.0 beta92.5.0 beta12.5.0 beta22.5.0 beta32.5.0 beta42.5.0 beta52.5.0 beta62.5.0 beta72.6.0 beta12.6.0 beta22.6.0 beta32.6.0 beta42.6.0 beta52.6.0 beta62.7.0 beta12.7.0 beta22.7.0 beta32.7.0 beta42.7.0 beta52.7.0 beta62.7.0 beta72.7.0 beta82.7.0 beta92.8.0 beta12.8.0 beta102.8.0 beta112.8.0 beta22.8.0 beta32.8.0 beta42.8.0 beta52.8.0 beta62.8.0 beta72.8.0 beta82.8.0 beta92.9.0 beta12.9.0 beta102.9.0 beta112.9.0 beta122.9.0 beta132.9.0 beta142.9.0 beta22.9.0 beta32.9.0 beta42.9.0 beta52.9.0 beta62.9.0 beta72.9.0 beta82.9.0 beta93.0.0 beta153.0.0 beta163.1.0 beta13.1.0 beta23.1.0 beta33.1.0 beta53.1.0 beta6
Affected range stops below 3.0.6, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.1.0.beta7, 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:

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-362

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