CVE-2024-27100Network attack vector

Service disruption via unbounded staff-action parameters

Published Mar 15, 2024 · Updated Aug 2, 2024

Uncontrolled resource consumption in Discourse stable 3.2.0 and earlier allows remote authenticated users to make an instance inoperable. The suspend, silence, and CSV-export controllers accept oversized reason, user-list, entity, and argument values, causing excessive work and oversized history records. Moderator access on the same site, or staff access to another site in the same multisite cluster, is required; successful requests interrupt the forum service.

CVSS severity6.5
Medium
EPSS probability0.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled resource consumption in Discourse stable 3.2.0 and earlier allows remote authenticated users to make an instance inoperable. The suspend, silence, and CSV-export controllers accept oversized reason, user-list, entity, and argument values, causing excessive work and oversized history records. Moderator access on the same site, or staff access to another site in the same multisite cluster, is required; successful requests interrupt the forum service.

The record

CVE
CVE-2024-27100
Published
Mar 15, 2024
Updated
Aug 2, 2024
Vendor
Discourse
Product
Discourse
Classifications
CWE-400, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 15, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=beta <= 3.3.0.beta1
  2. Affected versionversion=stable <= 3.2.0
  3. Affected versionversion=tests-passed <= 3.3.0.beta1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Discourse · Discourseversion=beta <= 3.3.0.beta1; version=stable <= 3.2.0; version=tests-passed <= 3.3.0.beta1

Published CVSS scores

6.5GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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