Charles McAuley has discovered a vulnerability in Firefox, which can be exploited by malicious people to trick users into disclosing sensitive information.
Successful exploitation allows an arbitrary file on the user's system to be uploaded to a malicious web site, but requires that the user type text containing the characters of the filename.
The vulnerability is confirmed in version 126.96.36.199 and 188.8.131.52. Other versions may also be affected.
Solution: Update to version 184.108.40.206.
Provided and/or discovered by: Charles McAuley
NOTE: A variant of this vulnerability was reported in a Mozilla Bugzilla bug entry back in 2000.
Original Advisory: Mozilla Foundation:
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Subject: Firefox File Upload Form Keystroke Event Cancel Vulnerability
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