CVE-2024-21655

Insufficient control of custom field value sizes

MEDIUM
4.3
CVSS Score
Published: January 12, 2024 at 08:46 PM UTC
Updated: June 17, 2026 at 07:09 AM UTC
1 product affected across 1 vendorDiscourse

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Severity
MEDIUM4.3
Exploit prediction
EPSS 0.6%
SSVC
No known exploit

Description

Discourse is a platform for community discussion. For fields that are client editable, limits on sizes are not imposed. This allows a malicious actor to cause a Discourse instance to use excessive disk space and also often excessive bandwidth. The issue is patched 3.1.4 and 3.2.0.beta4.

Affected

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

v < 3.1.4v < 3.2.0.beta43.2.0 beta13.2.0 beta23.2.0 beta3
Affected range stops below 3.1.4, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.2.0.beta4, 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

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

Quick Info

StatusMODIFIED
CWE
CWE-400CWE-770

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