Unauthenticated post modification via unchecked form parameters
Published May 31, 2026 · Updated May 31, 2026
Missing authorization in WP Engine Advanced Custom Fields 6.8.1 and earlier allows remote attackers to overwrite WordPress post content. The front-end form handler accepts attacker-controlled _post_title and _post_content values and updates the post bound to acf_form() without verifying permission for that write. Exploitation requires a publicly accessible acf_form() instance bound to the target post; the documented impact is limited to its title and content.
Summary
What happened
Missing authorization in WP Engine Advanced Custom Fields 6.8.1 and earlier allows remote attackers to overwrite WordPress post content. The front-end form handler accepts attacker-controlled _post_title and _post_content values and updates the post bound to acf_form() without verifying permission for that write. Exploitation requires a publicly accessible acf_form() instance bound to the target post; the documented impact is limited to its title and content.
The record
- CVE
- CVE-2026-8382
- Published
- May 31, 2026
- Updated
- May 31, 2026
- Vendor
- WP Engine
- Product
- Advanced Custom Fields
- Classifications
- CWE-862, T1565.001
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 31, 2026CVE publishedPublication date reported by the CVE source.
- May 31, 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.
- Affected versionversion=0 <=6.8.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
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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