CVE-2022-24850Network attack vector

Category permission disclosure via unguarded serialization

Published Apr 14, 2022 · Updated Apr 23, 2025

Information disclosure in Discourse stable before 2.8.3 and beta before 2.9.0.beta4 allows remote attackers to read category group permissions. CategoriesController#show and #find_by_slug serialized group_permissions without checking whether the requester could edit the category. Access to any category was sufficient, including anonymous access to public categories, and exposed group names plus read, write, or create rights without exposing category content.

CVSS severity5.3
Medium
EPSS probability0.66%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Discourse stable before 2.8.3 and beta before 2.9.0.beta4 allows remote attackers to read category group permissions. CategoriesController#show and #find_by_slug serialized group_permissions without checking whether the requester could edit the category. Access to any category was sufficient, including anonymous access to public categories, and exposed group names plus read, write, or create rights without exposing category content.

The record

CVE
CVE-2022-24850
Published
Apr 14, 2022
Updated
Apr 23, 2025
Vendor
Discourse
Product
Discourse
Classifications
CWE-200
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 14, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 2025Record 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=< 2.8.3
  2. Affected versionversion=< 2.9.0.beta4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Discourse · Discourseversion=< 2.8.3; version=< 2.9.0.beta4

Published CVSS scores

5.3GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
4.0NIST NVDAV:N/AC:L/Au:S/C:P/I:N/A:N
4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor

Public exploit references

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Technologies

Your stack

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Your stack

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