# CVE-2022-0964: showdoc XSS — Fixed in 2.10.4

🐘

🐘 Packagist

Not in CISA KEV

HIGH severity

# CVE-2022-0964 — showdoc

HIGH [Fix: star7th/showdoc@3caa323](https://github.com/star7th/showdoc/commit/3caa32334db0c277b84e993eaca2036f5d1dbef8)

CVE-2022-0964 is a high-severity (CVSS 8) Cross-site Scripting (XSS) vulnerability in showdoc/showdoc. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for showdoc/showdoc — see the affected versions and patch details below.

Stored XSS viva .webmv file upload in star7th/showdoc

Also known as[GHSA-xm3x-787m-p66r](/vulnerability/GHSA-xm3x-787m-p66r)

Published

Mar 15, 2022

Updated

Oct 28, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

1 known

Exploitation data as of Nov 1, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

## EPSS Exploitation Probability

[via FIRST.org ↗](https://www.first.org/epss/)

0.8%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs58th percentile — riskier than 58% of all scored CVEsHighest risk

0.00%0.45%0.89%1.34%0.4%0.8%May 26Aug 26Nov 26

Probability of exploitation in the next 30 days, from [FIRST.org EPSS](https://www.first.org/epss/).

## How urgent is this, really

## Where this sits among everything scored

## Real-World Exposure

1 pkg affected

🐘`showdoc/showdoc`

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

## Description

ShowDoc prior to 2.10.4 is vulnerable to stored cross-site scripting via `.webmv` file upload.

## Affected Packages

1 total 1 fixed

Ecosystem

Package

Vulnerable range

Fix

🐘Packagist

`showdoc/showdoc` 

all versions

2.10.4`composer require showdoc/showdoc:^2.10.4`

## Affected Products

1 product · 1 configurations

Application

`showdoc`showdoc

< 2.10.4

range

Exploits & PoCs

1

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

[

Stored XSS viva .webmv file upload in GitHub repository star7th/showdoc …

huntr.devNVDMar 2022

](https://huntr.dev/bounties/dbe39998-8eb7-46ea-997f-7b27f6f16ea0)

## Detection & mitigation playbook

Open-source dependency

1.  ### Detect
    
    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for showdoc/showdoc, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
    
2.  ### Fix
    
    Update showdoc/showdoc to 2.10.4 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2022-0964 is resolved across your whole dependency graph.
    
3.  ### Workarounds
    
    Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.
    

## Frequently Asked Questions

ShowDoc prior to 2.10.4 is vulnerable to stored cross-site scripting via \`.webmv\` file upload.

O3 Security · Impact-Aware SCA

### Is CVE-2022-0964 in your dependencies?

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