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MEDIUM severity

showdoc is vulnerable to Cross-Site Request Forgery (CSRF)GHSA-pjjf-hc4q-g298

MEDIUMFix: star7th/showdoc@67093c8

GHSA-pjjf-hc4q-g298 is a medium-severity (CVSS 4.3) Cross-Site Request Forgery (CSRF) vulnerability in showdoc/showdoc. 1 public exploit reference exists, so weaponization risk is real. No vendor fix is recorded yet; mitigation options are listed below.

Also known asCVE-2021-3775
Published
Updated
Affected
1 pkg
Patched
See advisory
Exploits
1 known
Exploitation data as of Oct 10, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.4%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs34th percentile — riskier than 34% of all scored CVEsHighest risk
0.00%0.30%0.61%0.91%0.1%0.4%Apr 26Aug 26Oct 26

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

How urgent is this, really

GHSA-pjjf-hc4q-g298 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,738 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

showdoc is vulnerable to Cross-Site Request Forgery (CSRF).

Affected Packages

1 total
EcosystemPackageVulnerable rangeFix
🐘Packagistshowdoc/showdocall versionsNo fix

Affected Products

1 product · 1 configurations
Application
showdocshowdoc
≤ 2.9.12
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.

showdoc is vulnerable to Cross-Site Request Forgery (CSRF)

huntr.devNVDNov 2021

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. Remediation status

    No patched version of showdoc/showdoc has shipped for GHSA-pjjf-hc4q-g298 yet. Where your build allows, override or pin the dependency away from the vulnerable range, and apply any maintainer-recommended mitigation.

  3. Mitigate without a patch

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

showdoc is vulnerable to Cross-Site Request Forgery (CSRF).
O3 Security · Impact-Aware SCA

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showdoc is vulnerable to Cross-Site Request Forgery…