Private-category topic-count disclosure via unfiltered dismissal endpoint
Published Jun 13, 2023 · Updated Jan 2, 2025
Information disclosure in Discourse before 3.0.4 and 3.1.0.beta1 through 3.1.0.beta4 allows remote attackers to read private topic counts. The new-topics dismissal endpoint counts recently created topics without filtering categories the requester cannot access, returning the aggregate while withholding topic content. No authentication or user interaction is required, but disclosure is limited to the number of recent topics in inaccessible categories.
Summary
What happened
Information disclosure in Discourse before 3.0.4 and 3.1.0.beta1 through 3.1.0.beta4 allows remote attackers to read private topic counts. The new-topics dismissal endpoint counts recently created topics without filtering categories the requester cannot access, returning the aggregate while withholding topic content. No authentication or user interaction is required, but disclosure is limited to the number of recent topics in inaccessible categories.
The record
- CVE
- CVE-2023-34250
- Published
- Jun 13, 2023
- Updated
- Jan 2, 2025
- Vendor
- Discourse
- Product
- Discourse
- Classifications
- CWE-668, CWE-200, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 13, 2023CVE publishedPublication date reported by the CVE source.
- Jan 2, 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.
- Affected versionversion=< 3.0.4
- Affected versionversion=>= 3.1.0.beta1, < 3.1.0.beta5
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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