If such a vulnerability existed, it would be patched within days, and any tool claiming to use it would immediately stop working.
There is no legitimate software or service that can "unlock" private Facebook photos or posts
Several open-source and third-party extensions, such as FaceViewer on GitHub, claim to bypass Facebook's profile picture guard. FaceViewer, for example, is a Chrome extension designed to display Facebook profile pictures in full size.
no verified or legitimate "unlocker" tools that can bypass Facebook's privacy settings to view private photos. Websites or apps claiming to offer this service are almost universally scams designed to compromise your own security. The Reality of Facebook "Unlocker" Tools
You download a “viewer tool” (often a .exe file or APK). It could be:
If you have years of public photos, use the "Limit Past Posts" feature in your settings to instantly change all public historical posts to "Friends Only."
Prompts you to install a custom Chrome or Firefox extension. Hijacks your browser cookies and tracks your passwords. Legitimate Ways to See Private Facebook Photos
Other scams involve downloading software, browser extensions, or APK (Android application package) files. Instead of showing you private photos, these tools install malicious software on your device. The consequences can be severe:
Update your browser to view this website correctly. Update my browser now