CVE-2019-25738
WordPress Hybrid Composer 1.4.6 has a flaw that lets anyone change site settings without logging in. By sending a special request, an attacker can turn on user registration and make new users administrators. This can give the attacker full control of the site.
No official fix yet. If none appears within 45 days of first tracking, this entry is removed automatically.
Who is affected
WordPress sites using the Hybrid Composer plugin, version 1.4.6.
Real-world impact
An attacker could create new administrator accounts, take over the site, and potentially steal data or deface the site.
Why this severity
The CVSS score of 9.3 reflects that the vulnerability is exploitable over the network, requires no authentication, and can compromise confidentiality, integrity, and availability of the WordPress installation.
What to do about it
- ›Disable user registration in WordPress settings.
- ›Change the default role for new users to a non‑administrator role.
- ›Restrict access to the admin‑ajax.php endpoint or block the hc_ajax_save_option action.
- ›Upgrade to a newer version of Hybrid Composer if one is released.
No official fix or mitigation is documented in the sources yet. Monitor the vendor advisory and apply the patch as soon as it is released.
NVD description
Timeline
- Jun 4, 2026 · Jun 4, 2026PublishedDisclosed and added to the National Vulnerability Database.
- Jul 22, 2026 · 13d agoAdvisory updatedThe NVD record was last revised.