CVE-2017-0897: Expressionengine

High severity, CVSS 7.5. EPSS: 4% chance of exploitation in the next 30 days.

ExpressionEngine version 2.x < 2.11.8 and version 3.x < 3.5.5 create an object signing token with weak entropy. Successfully guessing the token can lead to remote code execution.

Affected products

• Expressionengine Expressionengine: version 2.0.0 only; version 2.0.1 only; version 2.0.2 only; version 2.1.0 only; version 2.1.1 only; version 2.1.2 only; …

Published 2017-06-22. Last modified 2026-06-17.