Firefly III before 4.7.17.3 is vulnerable to reflected XSS due to lack of filtration of user-supplied data in a search query. NOTE: It is asserted that an attacker must have the same access rights as the user in order to be able to execute the vulnerability
https://github.com/firefly-iii/firefly-iii/issues/2339
https://github.com/firefly-iii/firefly-iii/compare/a70b7cc...7d482aa