YITH WooCommerce Waitlist Premium <= 3.35.0 - Authenticated (Subscriber+) Privilege Escalation to Admin via wp_ajax_yith_wcwtl_add_user

Description

The YITH WooCommerce Waitlist Premium plugin for WordPress is vulnerable to Privilege Escalation in versions up to, and including, 3.35.0. This is due to the add_user_in_waiting_list() function registered on the wp_ajax_yith_wcwtl_add_user action being missing both a capability check and a nonce verification, and using parse_str() + extract() to import attacker-controlled variables from $_POST['params'] that are then passed to wp_create_user() and $user->set_role(). This makes it possible for authenticated attackers, with Subscriber-level access and above, to elevate their privileges to that of an administrator by creating a new user account and assigning it the administrator role.

Scores

EPSS (exploitation in 30 days)

0.44% · top 61% of all CVEs (6 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: total

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.8.

Weakness

• CWE-269 Improper Privilege Management (opens in a new tab)All about CWE-269 and its CVEs

Affected products

• Yith · YITH WooCommerce Waitlist Premium

  • affected ≤ 3.35.0

References (2)

• https://www.wordfence.com/threat-intel/vulnerabilities/id/48660afe-1e03-4bf5-b821-6538a4daf201?source=cve (opens in a new tab)
• https://yithemes.com/ (opens in a new tab)

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2026-14359](https://trackcve.app/badge/CVE-2026-14359.svg)](https://trackcve.app/cve/CVE-2026-14359)

Record last updated 9 Sept 2026, 15:06 UTC.