[unisharp/laravel-filemanager] UniSharp Laravel Filemanager directory traversal vulnerability

UniSharp laravel-filemanager (aka Laravel Filemanager) through 2.5.1 allows download?working_dir=%2F.. directory traversal to read arbitrary files, as exploited in the wild in June 2022.

References

• https://nvd.nist.gov/vuln/detail/CVE-2022-40734
• https://github.com/UniSharp/laravel-filemanager/issues/1150
• https://github.com/advisories/GHSA-5m2h-7rf2-rpx6