The package zendframework/zend-developer-tools provides a web-based toolbar for introspecting an application. When updating the package to support PHP 7.3, a change was made that could potentially prevent toolbar entries that are enabled by default from being disabled.

References

• zendframework/zend-developer-tools@ce27f46
• https://framework.zend.com/security/advisory/ZF2019-01
• https://github.com/FriendsOfPHP/security-advisories/blob/master/zendframework/zend-developer-tools/ZF2019-01.yaml