Ubuntu Security Notice 2937-1 - A large number of security issues were discovered in the WebKitGTK+ Web and JavaScript engines. If a user were tricked into viewing a malicious website, a remote attacker could exploit a variety of issues related to web browser security, including cross-site scripting attacks, denial of service attacks, and arbitrary code execution.
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Apple Security Advisory 2015-04-08-1 - Safari 8.0.5, Safari 7.1.5, and Safari 6.2.5 are now available and address information disclosure, code execution, certificate matching, and various other vulnerabilities.
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