Advanced Custom Fields <= 5.7.11 — PHP Object Injection
5eab8a5d-8eb8-495f-a953-b468360cc5d5Published · Updated Action summary
Affected: ≤5.7.11Update to 5.7.12 or newer
All remediation steps- Severity
- Medium5.4
- CVSS
- 5.4CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:NWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:LPrivileges required- Low
UI:NUser interaction- None
S:UScope- Unchanged
C:LConfidentiality- Low
I:LIntegrity- Low
A:NAvailability- None
- Weakness
- CWE-502 PHP Object Injection
- Required access
- Unknown
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
Advanced Custom Fields (ACF®) advanced-custom-fields
- Affected≤ 5.7.11
- Patched in5.7.12
Update to 5.7.12 or newer.
You are affected if you run ≤ 5.7.11. Version 5.7.12 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Advanced Custom Fields (ACF®).
- No admin access? Run a passive check of your site. It reads public files only.
What to do
- Update to version 5.7.12, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch Advanced Custom Fields (ACF®) to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to Slavco Mihajloski.
Advanced Custom Fields before 5.7.12 fails to sanitize user-supplied input before passing it to the unserialize() function. This allows low-level authenticated users to call PHP Objects and possibly achieve remote code execution if a usable gadget is present in a plugin or theme installed on the same site as the vulnerable plugin.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in Advanced Custom Fields (ACF®)
All 26| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| High7.2 | Unauthenticated Stored Cross-Site Scripting ≤6.8.10Update to 6.8.11 | CVE-2026-110813 | |
| Medium4.3 | Authenticated (Contributor+) Information Exposure ≤6.8.10Update to 6.8.11 | CVE-2026-97189 | |
| Medium4.3 | 6.8.10 - Authenticated (Contributor+) Insecure Direct Object Reference 6.2.0 – 6.8.10Update to 6.8.11 | CVE-2026-97190 | |
| Medium4.3 | Missing Authorization ≤6.8.10Update to 6.8.11 | CVE-2026-97191 | |
| Medium5.3 | Unauthenticated Arbitrary Post Modification via Front-End Form '_post_title' and '_post_content' Parameters ≤6.8.1Update to 6.8.2 | CVE-2026-8382 |
- High7.2Unauthenticated Stored Cross-Site Scripting
≤6.8.10Update to 6.8.11
- Medium4.3Authenticated (Contributor+) Information Exposure
≤6.8.10Update to 6.8.11
- Medium4.36.8.10 - Authenticated (Contributor+) Insecure Direct Object Reference
6.2.0 – 6.8.10Update to 6.8.11
- Medium4.3Missing Authorization
≤6.8.10Update to 6.8.11
- Medium5.3Unauthenticated Arbitrary Post Modification via Front-End Form '_post_title' and '_post_content' Parameters
≤6.8.1Update to 6.8.2
Same weakness (PHP Object Injection)
All PHP Object Injection| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| High7.2 | Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header | CVE-2026-120688 | |
| Critical9.8 | Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission | CVE-2026-125055 | |
| Critical9.8 | Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter | CVE-2026-119077 | |
| Medium5.3 | Unauthenticated Sensitive Information Exposure in 'search' Parameter | CVE-2026-121518 |
- High7.2Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header
EZ SQL Reports Shortcode Widget and DB Backup
≤5.25.25Update to 5.26.45
- Critical9.8Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission
Chatterbug Forms – Fast, Flexible WordPress Form Builder
≤1.0.2Update to 1.1
- Critical9.8Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter
ELEX WordPress HelpDesk & Customer Ticketing System
≤3.3.9Update to 3.4.0
- Medium5.3Unauthenticated Sensitive Information Exposure in 'search' Parameter
Customer Reviews for WooCommerce
≤5.127.0Update to 5.128.0
Timeline
CVE published
Severity medium, CVSS 5.4
Record last updated
Sources & licenses
- Vulnerability data
- Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
- CVSS / CWE
- National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.