CVE-2023-30611Network attack vector

Private-topic reaction disclosure via missing permission checks

Published Apr 19, 2023 · Updated Feb 5, 2025

Information disclosure in Discourse Reactions 0.2 allows remote attackers to read reaction metadata from posts in private topics. The post_reactions_users endpoint loads a post without enforcing guardian visibility, while reaction updates are published without a secure audience. A private post must contain a reaction, and its numeric ID must be known or guessed; exposure is limited to reaction activity and identities.

CVSS severity4.3
Medium
EPSS probability0.43%
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 Reactions 0.2 allows remote attackers to read reaction metadata from posts in private topics. The post_reactions_users endpoint loads a post without enforcing guardian visibility, while reaction updates are published without a secure audience. A private post must contain a reaction, and its numeric ID must be known or guessed; exposure is limited to reaction activity and identities.

The record

CVE
CVE-2023-30611
Published
Apr 19, 2023
Updated
Feb 5, 2025
Vendor
Discourse
Product
Discourse Reactions
Classifications
CWE-200, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 19, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 5, 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=>= 0.2, < 0.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Discourse · Discourse Reactionsversion=>= 0.2, < 0.3

Published CVSS scores

5.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
4.3GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:R/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
T1190Exploit Public-Facing Application

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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