Mentor assignment tampering via unchecked self-reference
Published Oct 18, 2025 · Updated Oct 20, 2025
Access control failure in Wikimedia GrowthExperiments before 1.39 allows remote authenticated users to alter mentor assignments through its API. ApiSetMentor waives the setmentor permission whenever the caller names the caller as mentor or mentee, without confirming that the supplied mentor is registered. Any signed-in user with an API token can assign an unqualified account as another user's mentor or claim an arbitrary account as the caller's mentor.
Summary
What happened
Access control failure in Wikimedia GrowthExperiments before 1.39 allows remote authenticated users to alter mentor assignments through its API. ApiSetMentor waives the setmentor permission whenever the caller names the caller as mentor or mentee, without confirming that the supplied mentor is registered. Any signed-in user with an API token can assign an unqualified account as another user's mentor or claim an arbitrary account as the caller's mentor.
The record
- CVE
- CVE-2025-62668
- Published
- Oct 18, 2025
- Updated
- Oct 20, 2025
- Vendor
- Wikimedia Foundation
- Product
- GrowthExperiments
- Classifications
- CWE-276, CAPEC-131, T1565.001
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Oct 18, 2025CVE publishedPublication date reported by the CVE source.
- Oct 20, 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=master <1.39
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
- growthsetmentor unauthorized mentor-assignment requestproof 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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