# CVE-2023-37300: Missing authorization in n/a

> Attackers can view hidden user information via the CheckUserLog API due to incorrect access control in the MediaWiki CheckUser extension.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 30 Jun 2023
- **Updated:** 27 Nov 2024
- **Also known as:** BIT-mediawiki-2023-37300, GHSA-7jff-vjgp-2fjv, UBUNTU-CVE-2023-37300

## What is CVE-2023-37300?

CVE-2023-37300 is a medium-severity missing authorization vulnerability in Mediawiki Mediawiki, published on 30 Jun 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An issue was discovered in the CheckUserLog API in the CheckUser extension for MediaWiki through 1.39.3. There is incorrect access control for visibility of hidden users.

Weakness: CWE-863 (Incorrect Authorization)

## Which versions are affected by CVE-2023-37300?

1 open source package ship an affected version, including mediawiki. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `mediawiki` | Bitnami | All versions | 1.39.4 |

Products: Mediawiki Mediawiki.

## How do I fix CVE-2023-37300?

Upgrade mediawiki to 1.39.4 or later.

## Is CVE-2023-37300 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-37300 exists.

## Other vulnerabilities in Mediawiki Mediawiki

- [CVE-2023-37303](https://insights.sbomify.com/CVE-2023-37303/): Denial of service in n/a (critical 9.8)
- [CVE-2022-29904](https://insights.sbomify.com/CVE-2022-29904/): SQL injection in n/a (critical 9.8)
- [CVE-2022-29906](https://insights.sbomify.com/CVE-2022-29906/): Missing authorization in n/a (critical 9.8)
- [CVE-2022-28205](https://insights.sbomify.com/CVE-2022-28205/): Business logic in n/a (critical 9.8)
- [CVE-2022-28206](https://insights.sbomify.com/CVE-2022-28206/): Missing authorization in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-37300 and fix it if it is affected.

What it is: CVE-2023-37300 is a medium-severity missing authorization vulnerability in Mediawiki Mediawiki, published on 30 Jun 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-37300 exists.

Affected packages and fixed versions:
- mediawiki (Bitnami): affected all versions; fixed in 1.39.4

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2023-37300/ (Markdown: https://insights.sbomify.com/CVE-2023-37300/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-37300
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-37300
- OSV: https://osv.dev/vulnerability/CVE-2023-37300

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-37300/
Summaries are generated and may contain mistakes; the official description above is the record.