# CVE-2022-50943: Moodle LMS 4.0 Cross-Site Scripting via course search.php

> Unauthenticated attackers can inject malicious scripts via the course search parameter to steal session cookies and execute arbitrary code in user browsers.

- **Severity:** Medium 5.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 10 May 2026
- **Updated:** 15 Jul 2026
- **Also known as:** BIT-moodle-2022-50943, GHSA-f439-48pp-hm2q, UBUNTU-CVE-2022-50943

## What is CVE-2022-50943?

CVE-2022-50943 is a medium-severity cross-site scripting vulnerability in Moodle Moodle, published on 10 May 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

Moodle LMS 4.0 contains a cross-site scripting vulnerability that allows unauthenticated attackers to inject malicious scripts by submitting payloads through the search parameter. Attackers can inject JavaScript code via the search field in course/search.php to execute arbitrary scripts in users' browsers and steal session cookies.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2022-50943?

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


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `moodle` | Bitnami | All versions to 4.0.0 | None |

Products: Moodle Moodle.

## How do I fix CVE-2022-50943?

No fix has been published for CVE-2022-50943 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-50943 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-50943 exists.

## Other vulnerabilities in Moodle Moodle

- [CVE-2006-4935](https://insights.sbomify.com/CVE-2006-4935/): File upload in n/a (critical 10.0)
- [CVE-2006-4936](https://insights.sbomify.com/CVE-2006-4936/): Moodle does not properly validate module instance id (critical 10.0)
- [CVE-2004-2233](https://insights.sbomify.com/CVE-2004-2233/): Unknown "front page vulnerability with Moodle servers" for Moodle before 1.3.2 has unknown impact and attack vectors. (critical 10.0)
- [CVE-2004-2235](https://insights.sbomify.com/CVE-2004-2235/): Cross-site scripting in n/a (critical 10.0)
- [CVE-2004-2236](https://insights.sbomify.com/CVE-2004-2236/): Other in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-50943 and fix it if it is affected.

What it is: CVE-2022-50943 is a medium-severity cross-site scripting vulnerability in Moodle Moodle, published on 10 May 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-50943 exists.

Affected packages and fixed versions:
- moodle (Bitnami): affected all versions up to 4.0.0; 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-2022-50943/ (Markdown: https://insights.sbomify.com/CVE-2022-50943/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-50943
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-50943
- OSV: https://osv.dev/vulnerability/CVE-2022-50943

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-50943/
Summaries are generated and may contain mistakes; the official description above is the record.