Reported vulnerability
Advanced Custom Fields <= 6.3.8 & Secure Custom Fields <= 6.3.6.2 - Authenticated (Admin+) Stored Cross-Site Scripting
Published 15 Oct 2024
Updated 18 Oct 2024
CVE-2024-49593
Compare your installed software with the affected versions below. Follow the source’s remediation guidance and test an available update after taking a backup. A database entry describes a reported issue; it does not establish whether a particular website has been compromised.
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Wordfence advisory
medium · CVSS 4.4The Advanced Custom Fields & Secure Custom Fields plugins for WordPress are vulnerable to Stored Cross-Site Scripting via ACF field labels in all versions up to, and including, 6.3.8 & 6.3.6.2 respectively due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level access, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled. Please follow the reference listed in this vulnerability record for instructions on how to update to the latest version of ACF that patches this issue and ensures accessibility to updates moving forward. Special note: only the minified files in Secure Custom Fields have been patched meaning the source build files are still vulnerable.
Severity vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N
Advanced Custom Fields (ACF®)
- Software
- plugin · advanced-custom-fields
- Affected versions
- Start version unspecified, through 6.3.6.2
- Fix availability
- Fix available
- Fixed versions
- 6.3.6.3
Recommended action
Update to version 6.3.6.3, or a newer patched version
Advanced Custom Fields
- Software
- plugin · advanced-custom-fields
- Affected versions
- Start version unspecified, through 6.3.6; From 6.3.7, through 6.3.7; From 6.3.8, through 6.3.8
- Fix availability
- Fix available
- Fixed versions
- 6.3.9
Recommended action
Update to version 6.3.9, or a newer patched version
Advanced Custom Fields Pro
- Software
- plugin · advanced-custom-fields-pro
- Affected versions
- Start version unspecified, through 6.3.8
- Fix availability
- Fix available
- Fixed versions
- 6.3.9
Recommended action
Update to version 6.3.9, or a newer patched version
Further references (1)
Data sources and licences
Copyright 2012-2026 Defiant Inc.
Defiant hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute this software vulnerability information. Any copy of the software vulnerability information you make for such purposes is authorized provided that you include a hyperlink to this vulnerability record and reproduce Defiant's copyright designation and this license in any such copy.
Read licence termsCopyright 1999-2026 The MITRE Corporation
CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE®). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.
Read licence termsSource: Wordfence
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Get help with this issueQuestions about this vulnerability
How do I check which product and version this report affects?
This report covers more than one product. Choose your plugin, theme or WordPress core in the version checker, then enter its installed version. Each product has its own affected ranges and fix details in the report above.
Which update should I install?
Find your exact product in the report and read its fixed versions and recommended action. Fix details for one product do not apply to every product covered by this advisory. Follow the linked source when no fixed version is specified.
Does an affected version mean my website has been hacked?
An affected version means the installed release matches a vulnerability described in this report. It does not show whether anyone has exploited it on your website. The checker compares version numbers with stored reports; it does not inspect your website.
Does a version outside these ranges mean my website is secure?
A version outside the reported ranges is not listed as affected by this particular issue. Other vulnerabilities, missing information or a previous compromise still need separate checks. Review other reports for your product and keep your website maintained.
Other reports for the same product
These reports cover at least one of the same plugins, themes or WordPress core. Check each report’s affected versions separately.
- Advanced Custom Fields (ACF®) <= 6.8.1 - Unauthenticated Arbitrary Post Modification via Front-End Form '_post_title' and '_post_content' ParametersUpdated 31 May 2026
- Advanced Custom Fields (ACF®) <= 6.8.1 - Missing AuthorizationUpdated 1 Jun 2026
- Advanced Custom Fields (ACF®) <= 6.7.0 - Unauthenticated Missing Authorization to Arbitrary Post/Page Disclosure via AJAX Field Query ParametersUpdated 15 Apr 2026
- Advanced Custom Fields <= 6.4.2. - HTML InjectionUpdated 25 Aug 2025
- Advanced Custom Fields <= 6.3.8 - Authenticated (Admin+) Limited Arbitrary Function CallUpdated 16 Oct 2024