Cross-user data disclosure via WebSocket authorization bypass
Published Sep 27, 2022 · Updated May 21, 2025
Incorrect authorization in Zammad 5.2.0 through 5.2.1 allows remote authenticated users to read other users' personal data. The asset-handling logic that restricts customer-visible data is ineffective for requests sent over a WebSocket, allowing API queries to return assets belonging to other users. A valid customer session is required; the documented consequence is cross-user confidentiality loss, with no reported data modification or service interruption.
Summary
What happened
Incorrect authorization in Zammad 5.2.0 through 5.2.1 allows remote authenticated users to read other users' personal data. The asset-handling logic that restricts customer-visible data is ineffective for requests sent over a WebSocket, allowing API queries to return assets belonging to other users. A valid customer session is required; the documented consequence is cross-user confidentiality loss, with no reported data modification or service interruption.
The record
- CVE
- CVE-2022-40816
- Published
- Sep 27, 2022
- Updated
- May 21, 2025
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-863, T1213
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 27, 2022CVE publishedPublication date reported by the CVE source.
- May 21, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What is affected?
Affected products and versions are unavailable in this record.
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.
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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