Risk Letters

Exploited vulnerability

CVE-2026-78175

TLP:CLEAR

Themeum tutor_lms Deserialization of Untrusted Data

The Tutor LMS – eLearning and online course solution plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 4.0.7 via the `withdraw_method_field` parameter of the `tutor_save_withdraw_account` AJAX handler. This is due to the handler lacking any capability or role check, relying solely on a nonce, while also passing attacker-supplied values through `esc_sq

Facts

  • Vendor: Themeum
  • Product: tutor_lms
  • CVSS: 8.8
  • EPSS (probability of exploitation within 30 days): 1.1 %
  • First known exploitation: 13 October 2026
  • First seen by Risk Letters: 12 September 2026

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Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD