[Security] Typos in Security's ExpressionLanguage

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #9593
| License       | MIT
| Doc PR        | none

Fixed the ExpressionLanguage and added the tests. It looks ok to me, but please, take a close look (some people will depend on this working right, including me :D ).

Thanks !