Privilege escalation in Hwk-fr Advanced Custom Fields: Extended
CVE-2026-8809
The Advanced Custom Fields: Extended plugin for WordPress is vulnerable to Privilege Escalation via Validation Bypass in all versions up to and including 0.9.2.5. The vulnerability exists due to the after_validate_save_post() function unco…
Vulnerability class: Privilege Escalation
EPSS: 0.002 (45.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Hwk-fr Advanced Custom Fields: Extended — versions 0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-8809?
- CVE-2026-8809 is a critical-severity vulnerability in Hwk-fr Advanced Custom Fields: Extended, classified under Improper Privilege Management. CVSS score: 9.8/10. Published 2026-05-28.
- How severe is CVE-2026-8809?
- Critical severity. CVSS v3 base score is 9.8 out of 10.