Auth bypass in Framework-Y Hybrid Composer
CVE-2019-25738
WordPress Hybrid Composer 1.4.6 contains an unauthenticated settings change vulnerability that allows unauthenticated attackers to modify WordPress options by exploiting the hc_ajax_save_option action. Attackers can send POST requests to the admin-ajax.php endpoint with the action parameter set to hc_ajax_save_option to enable user registration and set the default role to administrator, enabling account takeover.
Vulnerability class: Broken Authentication
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.003 (25.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 26th percentile — 25.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Framework-Y Hybrid Composer — versions 1.4.6
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/47154 (exploit)
- wordpress.framework-y.com (product)
- wordpress.framework-y.com/hybrid-composer/ (product)
- labs.sucuri.net/wptf-hybrid-composer-unauthenticated-arbitrary-options-update/ (third-party-advisory)
- www.vulncheck.com/advisories/wordpress-hybrid-composer-unauthenticated-settings… (third-party-advisory)
Frequently asked questions
- What is CVE-2019-25738?
- CVE-2019-25738 is a critical-severity vulnerability in Framework-Y Hybrid Composer, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2026-06-04.
- How severe is CVE-2019-25738?
- Critical severity. CVSS v3 base score is 9.8 out of 10.