CVE-2025-67911: Tribulant Software Newsletters

Critical severity, CVSS 9.8. EPSS: 0.5% chance of exploitation in the next 30 days.

Deserialization of Untrusted Data vulnerability in Tribulant Software Newsletters newsletters-lite allows Object Injection.This issue affects Newsletters: from n/a through <= 4.11.

Affected products

• Tribulant Software Newsletters: up to and including 4.11

Published 2026-01-08. Last modified 2026-10-07.