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MEDIUM severity

Cross-site Scripting in ShowDocGHSA-wg4r-q74r-p7c8

MEDIUMFix: star7th/showdoc@4b6e660

GHSA-wg4r-q74r-p7c8 is a medium-severity (CVSS 5.4) 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.

Also known asCVE-2022-0941
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
1 known
Exploitation data as of Nov 3, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.6%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs50th percentile — riskier than 50% of all scored CVEsHighest risk
0.00%0.37%0.75%1.12%0.2%0.6%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from 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 is vulnerable to stored cross-site scripting due to unrestricted file upload in versions 2.10.3 and prior. A patch is available and anticipated to be part of version 2.10.4.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistshowdoc/showdocall versions2.10.4composer require showdoc/showdoc:^2.10.4

Affected Products

1 product · 1 configurations
Application
showdocshowdoc
≤ 2.10.3
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 due to Unrestricted File Upload in GitHub repository star7th/…

huntr.devNVDMar 2022

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 GHSA-wg4r-q74r-p7c8 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 is vulnerable to stored cross-site scripting due to unrestricted file upload in versions 2.10.3 and prior. A patch is available and anticipated to be part of version 2.10.4.
O3 Security · Impact-Aware SCA

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Cross-site Scripting in ShowDoc (Medium 5.4)