WordPress · Support Genix · CVE-2026-19806
**Name of the Vulnerable Software and Affected Versions**
Support Genix – Helpdesk, AI Chatbot, Knowledge Base & Customer Support Ticketing System versions prior to 1.4.53
**Description**
An authentication bypass exists that allows for administrator account takeover. The issue resides in the `guest ticket login()` function and its `p` parameter. The site-wide AES-256-CBC encryption key is generated using a low-entropy process involving three two-digit `wp rand(10, 99)` values and a Unix timestamp via `md5()`, resulting in approximately 19.5 bits of entropy. Additionally, the plugin uses a deterministic IV derived from the password and lacks authentication tags on ciphertext, capability checks, nonces, or session validation on the `/sgnix/?p=<token>` endpoint. Attackers with subscriber-level access or higher can use a legitimate guest ticket token as a known-plaintext oracle to recover the encryption key offline. By forging a `{ticket id, ticket user}` token for an administrator-owned ticket and submitting it to the endpoint, the `wp set auth cookie()` function is triggered, granting full administrative access to the site.
**Recommendations**
Update the plugin to a version later than 1.4.52.
As a temporary workaround, restrict access to the `/sgnix/?p=<token>` endpoint to minimize the risk of exploitation.