Private-room membership disclosure via regex room matching
Published Sep 23, 2022 · Updated May 22, 2025
Improper access control in Rocket.Chat before 5.0.0 allows remote authenticated users to list users in private rooms. The getUsersOfRoom Meteor server method accepts MongoDB operator objects where the rid parameter must be a string, allowing a crafted $regex query to match rooms beyond the first authorized result. Any authenticated account can invoke the method, exposing membership information for private rooms without allowing message access or data modification.
Summary
What happened
Improper access control in Rocket.Chat before 5.0.0 allows remote authenticated users to list users in private rooms. The getUsersOfRoom Meteor server method accepts MongoDB operator objects where the rid parameter must be a string, allowing a crafted $regex query to match rooms beyond the first authorized result. Any authenticated account can invoke the method, exposing membership information for private rooms without allowing message access or data modification.
The record
- CVE
- CVE-2022-32226
- Published
- Sep 23, 2022
- Updated
- May 22, 2025
- Vendor
- Rocket.Chat Technologies Corp.
- Product
- Rocket.Chat
- Classifications
- CWE-284, T1087
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 23, 2022CVE publishedPublication date reported by the CVE source.
- May 22, 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=Fixed in 4.7.5, 4.8.2 and 5.0.0
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.
Public exploit references
- getUsersOfRoom discloses users in private channelsproof of concept · demonstrated
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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