Opera Multiple Vulnerabilities

Multiple vulnerabilities have been identified in Opera, which can be exploited by malicious people to conduct cross-site scripting attacks and compromise a user's system.

1. An error when handling certain DOM elements can be exploited to bypass the HTML sanitizer and conduct cross-site scripting attacks.
2. An error when handling certain HTML characters can be exploited to bypass the HTML sanitizer and conduct cross-site scripting attacks.
3. An error when displaying the download dialog box within a small window can be exploited to download and execute a file by tricking a user into entering a specific keyboard sequence.