Technology · Wikimedia Foundation
Wikimedia Foundation CheckUser vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 3 vulnerabilities in Wikimedia Foundation CheckUser: 0 in the last 7 days and 2 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2023-37252, was published on 14 September 2026.
- Last 7 days
- 0
- Last 90 days
- 2
- Critical, all time
- 0
- Exploited in the wild
- 0
About Wikimedia Foundation CheckUser
An extension for MediaWiki that allows users with the appropriate permissions to check which IP addresses are used by a given username.
Latest Wikimedia Foundation CheckUser vulnerabilities
Most severe Wikimedia Foundation CheckUser vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
Vulnerabilities per week
The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 29 Jun 2026 | 1 | 0 | |
| 6 Jul 2026 | 0 | 0 | |
| 13 Jul 2026 | 0 | 0 | |
| 20 Jul 2026 | 0 | 0 | |
| 27 Jul 2026 | 0 | 0 | |
| 3 Aug 2026 | 0 | 0 | |
| 10 Aug 2026 | 0 | 0 | |
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 1 | 0 | |
| 21 Sep 2026 | 0 | 0 |
How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/technologies/checkuser.json, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "Wikimedia Foundation CheckUser vulnerabilities", https://junglewise.ai/threats/technologies/checkuser, 26 September 2026.