CVE-2023-6701Network attack vector

Stored XSS via unescaped shortcode output

Published Feb 5, 2024 · Updated Apr 8, 2026

Stored XSS in Advanced Custom Fields Free and PRO 6.2.4 and earlier allows remote authenticated users to inject scripts through fields. Contributors can write malicious custom metadata outside ACF's save path, bypassing its sanitization, and the ACF shortcode renders the stored value without HTML escaping. Contributor-level access and a page using the affected shortcode are required; visiting that page executes the script in the visitor's browser.

CVSS severity6.4
Medium
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Advanced Custom Fields Free and PRO 6.2.4 and earlier allows remote authenticated users to inject scripts through fields. Contributors can write malicious custom metadata outside ACF's save path, bypassing its sanitization, and the ACF shortcode renders the stored value without HTML escaping. Contributor-level access and a page using the affected shortcode are required; visiting that page executes the script in the visitor's browser.

The record

CVE
CVE-2023-6701
Published
Feb 5, 2024
Updated
Apr 8, 2026
Vendor
Delicious Brains
Product
Advanced Custom Fields PRO
Classifications
CWE-79, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 5, 2024CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=6.2.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Delicious Brains · Advanced Custom Fields PROversion=0 <=6.2.4
WP Engine · Advanced Custom Fieldsversion=0 <=6.2.4

Published CVSS scores

6.4WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1565.001Stored Data Manipulation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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