# GHSA-mxjf-hc9v-xgv2: ExtJS JavaScript framework used in TYPO3 vulnerable to Cross-site Scripting

> Attackers can exploit host header spoofing in TYPO3 to inject malicious scripts, potentially stealing user data or bypassing security controls.

- **Severity:** Not scored
- **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:** Yes
- **Published:** 30 May 2024

## What is GHSA-mxjf-hc9v-xgv2?

GHSA-mxjf-hc9v-xgv2 is a cross-site scripting vulnerability in typo3/cms, published on 30 May 2024. 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

Failing to properly validate the HTTP host-header TYPO3 CMS is susceptible to host spoofing. TYPO3 uses the HTTP host-header to generate absolute URLs in several places like 404 handling, http(s) enforcement, password reset links and many more. Since the host header itself is provided by the client it can be forged to any value, even in a name based virtual hosts environment. A blog post describes this problem in great detail.

## Which versions are affected by GHSA-mxjf-hc9v-xgv2?

8 open source packages ship an affected version, including typo3/cms.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `typo3/cms` | Packagist | From 4.5.0 | 4.5.34 |
| `typo3/cms` | Packagist | From 4.5.0 | 4.5.34 |
| `typo3/cms` | Packagist | From 4.7.0 | 4.7.19 |
| `typo3/cms` | Packagist | From 4.7.0 | 4.7.19 |
| `typo3/cms` | Packagist | From 6.1.0 | 6.1.9 |
| `typo3/cms` | Packagist | From 6.1.0 | 6.1.9 |
| `typo3/cms` | Packagist | From 6.2.0 | 6.2.3 |
| `typo3/cms` | Packagist | From 6.2.0 | 6.2.3 |

## How do I fix GHSA-mxjf-hc9v-xgv2?

Upgrade typo3/cms to a fixed version for your release line: 4.5.34, 4.7.19, 6.1.9 or 6.2.3.

## Is GHSA-mxjf-hc9v-xgv2 being exploited?

There is no known exploitation of GHSA-mxjf-hc9v-xgv2 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for GHSA-mxjf-hc9v-xgv2 and fix it if it is affected.

What it is: GHSA-mxjf-hc9v-xgv2 is a cross-site scripting vulnerability in typo3/cms, published on 30 May 2024. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of GHSA-mxjf-hc9v-xgv2 in the wild and no public exploit code.

Affected packages and fixed versions:
- typo3/cms (Packagist): affected from 4.5.0; fixed in 4.5.34
- typo3/cms (Packagist): affected from 4.5.0; fixed in 4.5.34
- typo3/cms (Packagist): affected from 4.7.0; fixed in 4.7.19
- typo3/cms (Packagist): affected from 4.7.0; fixed in 4.7.19
- typo3/cms (Packagist): affected from 6.1.0; fixed in 6.1.9
- typo3/cms (Packagist): affected from 6.1.0; fixed in 6.1.9
- typo3/cms (Packagist): affected from 6.2.0; fixed in 6.2.3
- typo3/cms (Packagist): affected from 6.2.0; fixed in 6.2.3

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/GHSA-mxjf-hc9v-xgv2/ (Markdown: https://insights.sbomify.com/GHSA-mxjf-hc9v-xgv2/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/GHSA-mxjf-hc9v-xgv2

---
From sbomify Insights: https://insights.sbomify.com/GHSA-mxjf-hc9v-xgv2/
Summaries are generated and may contain mistakes; the official description above is the record.