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Published 20 hours ago • verified publisher icon SafeExamBrowser

Crash when pasting twice in some JS editors in UIWebView.

Open mteep opened this issue 2 years ago • 3 comments

Certain JavaScript editors (Quill) in the "classical" web view (UIWebView) may cause SEB to crash when an attempt is made to paste text twice using keyboard shortcuts on iPad.

The first paste action has been observed to make the editor lose focus. As a result, the following paste action has nowhere to go, which causes a paste: message to be sent to the UIWebView. Its (default) implementation of doesNotRecognizeSelector: throws an exception which isn't caught, causing the app to crash.

I have a fix ready where I simply override doesNotRecognizeSelector: in the existing UIWebView category to do nothing, except log.

This issue was observed in AAC mode on iPadOS 15.7.3. (The fix hasn't been tested in single app mode since I don't have the entitlement.)

mteep avatar Mar 31 '23 11:03 mteep