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MEDIUM severity

CVE-2022-0950 — showdoc

MEDIUMFix: star7th/showdoc@237ac6d

CVE-2022-0950 is a medium-severity (CVSS 6.5) Unrestricted File Upload vulnerability in showdoc/showdoc. 1 public exploit reference exists, so weaponization risk is real. A fix is available for showdoc/showdoc — see the affected versions and patch details below.

Unrestricted Upload of File with Dangerous Type in star7th/showdoc

Also known asGHSA-v94v-pxqp-5qgj
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
1 known
Exploitation data as of Oct 7, 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 CVEs49th percentile — riskier than 49% of all scored CVEsHighest risk
0.00%0.38%0.76%1.13%0.3%0.6%0.6%Apr 26Sep 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

CVE-2022-0950 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,386 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

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

The upload feature of ShowDoc prior to version 2.10.4 allows files with the extension .*html, which leads to stored cross-site scripting.

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.

Unrestricted Upload of File with Dangerous Type in GitHub repository sta…

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 CVE-2022-0950 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

The upload feature of ShowDoc prior to version 2.10.4 allows files with the extension `.*html`, which leads to stored cross-site scripting.
O3 Security · Impact-Aware SCA

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CVE-2022-0950: showdoc XSS — Fixed in 2.10.4