# CVE-2020-12051: Information disclosure in n/a

> Remote attackers can retrieve sensitive hidden account information via the API, bypassing browser access restrictions in the CentralAuth extension.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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:** 21 Apr 2020
- **Updated:** 4 Aug 2024
- **Also known as:** BIT-mediawiki-2020-12051, GHSA-4892-82wr-4cv3, MINI-269c-gh2j-x84f, MINI-fvxc-g39j-x6xg, MINI-g6gg-hr7c-j228, MINI-rp6g-jhmc-r625

## What is CVE-2020-12051?

CVE-2020-12051 is a high-severity vulnerability in Mediawiki Mediawiki, published on 21 Apr 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The CentralAuth extension through REL1_34 for MediaWiki allows remote attackers to obtain sensitive hidden account information via an api.php?action=query&meta=globaluserinfo&guiuser= request. In other words, the information can be retrieved via the action API even though access would be denied when simply visiting wiki/Special:CentralAuth in a web browser.

## Which versions are affected by CVE-2020-12051?

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


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `mediawiki` | Bitnami | All versions | None |

Products: Mediawiki Mediawiki.

## How do I fix CVE-2020-12051?

Apply the vendor's patch.

## Is CVE-2020-12051 being exploited?

There is no known exploitation of CVE-2020-12051 in the wild and no public exploit code.

## 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-2020-12051 and fix it if it is affected.

What it is: CVE-2020-12051 is a high-severity vulnerability in Mediawiki Mediawiki, published on 21 Apr 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-12051 in the wild and no public exploit code.

Affected packages and fixed versions:
- mediawiki (Bitnami): affected all versions; no fix listed

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-2020-12051/ (Markdown: https://insights.sbomify.com/CVE-2020-12051/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-12051
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-12051
- OSV: https://osv.dev/vulnerability/CVE-2020-12051

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-12051/
Summaries are generated and may contain mistakes; the official description above is the record.