# CVE-2023-37252

## Summary

- **CVE ID:** CVE-2023-37252
- **Severity:** LOW
- **CVSS Score:** 3.1 (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N)
- **CWE:** CWE-669
- **Published:** Sep 14, 2026
- **Last Modified:** Sep 14, 2026

## Description

An issue was discovered in the CheckUser extension for MediaWiki through 1.39.3. Special:CheckUserLog shows usernames that have been hidden.

## Affected Products

- MediaWiki — CheckUser (0)
- MediaWiki — CheckUser (1.36.0)
- MediaWiki — CheckUser (1.39.0)

## References

- [CNA](https://phabricator.wikimedia.org/T330968)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.20%
- **EPSS Percentile:** 9.7

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._