CVE-2026-19806
Vulnérabilité élevée dans Support Genix – Helpdesk, AI Chatbot, Knowledge Base & Customer Support Ticketing System (devitemsllc)
Description
The Support Genix – Helpdesk, AI Chatbot, Knowledge Base & Customer Support Ticketing System plugin for WordPress is vulnerable to Authentication Bypass leading to Administrator Account Takeover in all versions up to, and including, 1.4.52 via the `guest_ticket_login()` function and its `p` parameter. This is due to the site-wide AES-256-CBC encryption key being derived from only three two-digit `wp_rand(10, 99)` values and a Unix timestamp via `md5()` — yielding approximately 19.5 bits of entropy — combined with a deterministic IV derived from the password, no authentication tag on the ciphertext, and no capability check, nonce, or session validation on the publicly reachable `/sgnix/?p=<token>` endpoint. This makes it possible for authenticated attackers, with subscriber-level access and above, who can obtain a single legitimate guest ticket token as a known-plaintext oracle and bound the plugin activation timestamp, to exhaust the ~729,000-candidate keyspace entirely offline, recover the site-wide encryption key, and forge a self-consistent `{ticket_id, ticket_user}` token targeting any administrator-owned ticket. Submitting the forged token to the unprotected endpoint causes `wp_set_auth_cookie()` to be called for that administrator, granting the attacker full administrative access to the WordPress site.
Gravité et risque d'exploitation
CVE-2026-19806 obtient un score CVSS de 8.8/10, soit une gravité élevée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.40 %, ce qui la place devant 32.3 % des CVE référencées.
Que faire ?
- Vérifiez si Support Genix – Helpdesk, AI Chatbot, Knowledge Base & Customer Support Ticketing System (versions <=1.4.52, 0) est présent sur votre parc.
- Appliquez le correctif ou la version corrigée indiqués dans les références de l'éditeur.
- À défaut de correctif, limitez l'exposition (filtrage réseau, désactivation du composant).
- Automatisez la détection : les agents CVE Heimdall (gratuits, open source) corrèlent l'inventaire de vos serveurs avec la base CVE.
Références
- https://www.wordfence.com/threat-intel/vulnerabilities/id/188f7c1d-e8ad-4114-9aa4-c3e8b51c5f2c?source=cve
- https://plugins.trac.wordpress.org/browser/support-genix-lite/tags/1.4.51/modules/Apbd_wps_settings.php#L748
- https://plugins.trac.wordpress.org/browser/support-genix-lite/tags/1.4.51/modules/Apbd_wps_settings.php#L152
- https://plugins.trac.wordpress.org/browser/support-genix-lite/tags/1.4.51/libs/Apbd_Wps_EncryptionLib.php#L27
- https://plugins.trac.wordpress.org/browser/support-genix-lite/tags/1.4.51/core/secondary_helper.php#L754
- https://plugins.trac.wordpress.org/browser/support-genix-lite/tags/1.4.51/models/database/Mapbd_wps_ticket.php#L457
- https://plugins.trac.wordpress.org/browser/support-genix-lite/tags/1.4.50/modules/Apbd_wps_settings.php#L748
- https://plugins.trac.wordpress.org/browser/support-genix-lite/tags/1.4.50/modules/Apbd_wps_settings.php#L152
- https://plugins.trac.wordpress.org/browser/support-genix-lite/tags/1.4.50/libs/Apbd_Wps_EncryptionLib.php#L27
- https://plugins.trac.wordpress.org/browser/support-genix-lite/tags/1.4.50/core/secondary_helper.php#L754
- https://plugins.trac.wordpress.org/browser/support-genix-lite/tags/1.4.50/models/database/Mapbd_wps_ticket.php#L457
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3668350%40support-genix-lite&new=3668350%40support-genix-lite