# CVE-2022-0942: Stored XSS due to Unrestricted File Upload in star7th/showdoc

> Attackers can inject malicious scripts via unrestricted file uploads, leading to stored XSS and potential account takeover in ShowDoc.

- **Severity:** Critical 9.4 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 15 Mar 2022
- **Updated:** 2 Aug 2024
- **Also known as:** GHSA-9fcc-7g44-mxrj

## What is CVE-2022-0942?

CVE-2022-0942 is a critical cross-site scripting vulnerability in star7th/showdoc, published on 15 Mar 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Stored XSS due to Unrestricted File Upload in GitHub repository star7th/showdoc prior to 2.10.4.

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

## Which versions are affected by CVE-2022-0942?

2 open source packages ship an affected version, including showdoc/showdoc. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `showdoc/showdoc` | Packagist | All versions | 2.10.4 |
| `showdoc/showdoc` | Packagist | All versions | 2.10.4 |

Products: Showdoc Showdoc.

## How do I fix CVE-2022-0942?

Upgrade showdoc/showdoc to 2.10.4 or later.

## Is CVE-2022-0942 being exploited?

There is no known exploitation of CVE-2022-0942 in the wild and no public exploit code.

## Other vulnerabilities in star7th/showdoc

- [CVE-2021-41745](https://insights.sbomify.com/CVE-2021-41745/): Showdoc File Upload Vulnerability (critical 9.8)
- [CVE-2021-36440](https://insights.sbomify.com/CVE-2021-36440/): Unrestricted File Upload in ShowDoc v2.9.5 (critical 9.8)
- [CVE-2022-1034](https://insights.sbomify.com/CVE-2022-1034/): There is a Unrestricted Upload of File vulnerability in ShowDoc v2.10.3 in star7th/showdoc (critical 9.1)
- [CVE-2022-0945](https://insights.sbomify.com/CVE-2022-0945/): Stored XSS viva axd and cshtml file upload in star7th/showdoc in star7th/showdoc (critical 9.0)
- [CVE-2022-0965](https://insights.sbomify.com/CVE-2022-0965/): Stored XSS viva .ofd file upload in star7th/showdoc (critical 9.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-0942 and fix it if it is affected.

What it is: CVE-2022-0942 is a critical cross-site scripting vulnerability in star7th/showdoc, published on 15 Mar 2022. 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-2022-0942 in the wild and no public exploit code.

Affected packages and fixed versions:
- showdoc/showdoc (Packagist): affected all versions; fixed in 2.10.4
- showdoc/showdoc (Packagist): affected all versions; fixed in 2.10.4

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-2022-0942/ (Markdown: https://insights.sbomify.com/CVE-2022-0942/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-0942
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-0942
- OSV: https://osv.dev/vulnerability/CVE-2022-0942

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-0942/
Summaries are generated and may contain mistakes; the official description above is the record.