CVE-2023-37252
MediaWiki CheckUser Extension Information Disclosure Vulnerability
Description
An issue was discovered in the CheckUser extension for MediaWiki through 1.39.3. Special:CheckUserLog shows usernames that have been hidden.
INFO
Published Date :
Sept. 14, 2026, 5:16 a.m.
Last Modified :
Sept. 14, 2026, 6:16 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | LOW | [email protected] |
Solution
- Update the CheckUser extension to the latest version.
- Review access controls for Special:CheckUserLog.
- Apply vendor patches promptly.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2023-37252.
| URL | Resource |
|---|---|
| https://phabricator.wikimedia.org/T330968 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2023-37252 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2023-37252
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2023-37252 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2023-37252 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
Sep. 14, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N Added CWE CWE-669 Added Affected Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2023/37xxx/CVE-2023-37252.json">CVE-2023-37252</a> -
New CVE Received by [email protected]
Sep. 14, 2026
Action Type Old Value New Value Added Description An issue was discovered in the CheckUser extension for MediaWiki through 1.39.3. Special:CheckUserLog shows usernames that have been hidden. Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2023/37xxx/CVE-2023-37252.json">CVE-2023-37252</a> Added Reference https://phabricator.wikimedia.org/T330968