EspoCRM PHP Object Injection Vulnerability

EspoCRM, an open source customer relationship management application, is affected by a PHP object injection vulnerability prior to version 9.3.7.

An authenticated administrator can supply crafted serialized PHP object data that is stored in background MassAction or Export parameters and later deserialized by the application. The deserialization paths do not restrict allowed classes, allowing attacker-controlled object instantiation and arbitrary code execution on the server.

• Affected versions: prior to 9.3.7
• Precondition: authenticated administrator access
• Impact: arbitrary code execution on the server
• Fixed in: 9.3.7