Review file permissions on your server — nothing should be world-writable

Server file permission review addresses a genuine, foundational security principle — files and directories should carry only the minimum access permissions actually required for legitimate functionality, and overly permissive settings, particularly world-writable permissions, create unnecessary risk that any compromise elsewhere in your system could be leveraged to modify files it shouldn't have access to.

World-writable permissions specifically represent a particularly severe configuration risk — this setting allows any user or process on the system, including potentially compromised or malicious ones, to modify the affected files, meaning a vulnerability in an entirely unrelated part of your system could potentially be leveraged to modify these overly permissive files as part of a broader attack.

This review requires genuinely, systematically checking your actual server's file and directory permissions against the principle of least privilege — each file and directory should carry only the specific access level actually required for its legitimate function, rather than defaulting to broad, convenient permissions that happen to avoid permission-related errors during development but that create unnecessary risk in production.

Correcting overly permissive settings requires genuine understanding of what access level each specific file or directory actually needs for legitimate functionality — this sometimes requires careful testing to ensure tightened permissions don't inadvertently break legitimate application functionality that was relying on the previously overly broad access, making this a task warranting genuine care rather than blanket permission restriction applied without understanding actual functional requirements.