Ability to trust not validated macro signatures removed in high security mode

Certificate Validation user interface in LibreOffice allows potential vulnerability.

Signed macros are scripts that have been digitally signed by the

developer using a cryptographic signature. When a document with a signed

macro is opened a warning is displayed by LibreOffice before the macro

is executed.

Previously if verification failed the user could fail to understand the failure and choose to enable the macros anyway.

This issue affects LibreOffice: from 24.2 before 24.2.5.