Opera versions 7.22 and below allow for a remote site to overwrite local files during temporary file creation due to a lack of sanitizing filenames.
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Opera for Windows v7.x prior to v7.23 build 3227 remote exploit which sets up a web server and feeds Opera a URL that will create and execute a batch file on the clients computer.
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Opera for Windows v7.x prior to v7.23 build 3227 contains a file overwrite vulnerability which allows remote downloads to overwrite any file on the filesystem.
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