What is CVE-2023-37252?

CVE-2023-37252 is a low-severity vulnerability in MediaWiki Checkuser, classified under Incorrect Resource Transfer Between Spheres. CVSS score: 3.1/10. Published 2026-09-14.

How severe is CVE-2023-37252?

Low severity. CVSS v3 base score is 3.1 out of 10.

Vulnerability in MediaWiki Checkuser

CVE-2023-37252

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

EPSS: 0.002 (9.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 3.1 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N.

Affected products

Mediawiki Checkuser

Weakness classification (CWE)

CWE-669 — Incorrect Resource Transfer Between Spheres

References

cve@mitre.org

Frequently asked questions

What is CVE-2023-37252?: CVE-2023-37252 is a low-severity vulnerability in MediaWiki Checkuser, classified under Incorrect Resource Transfer Between Spheres. CVSS score: 3.1/10. Published 2026-09-14.
How severe is CVE-2023-37252?: Low severity. CVSS v3 base score is 3.1 out of 10.