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gnome-shell 3.22 through 3.24.1 mishandles extensions that fail to reload, which can lead to leaving extensions enabled in the lock screen. With these extensions, a bystander could launch applications (but not interact with them), see information from the extensions (e.g., what applications you have opened or what music you were playing), or even execute arbitrary commands. It all depends on what extensions a user has enabled. The problem is caused by lack of exception handling in js/ui/extensionSystem.js.
Use CWE-20, Gnome vendor hub and Gnome-Shell product page to widen CVE-2017-8288 into its surrounding weakness, vendor, and product context.
Compare it with CVE-2014-7300, CVE-2010-4000 and CVE-2012-4427 for nearby disclosures in the same product family.