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Bug
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Resolution: Fixed
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Medium
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6.3.3
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Severity 2 - Major
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The usermacros resource in Atlassian Confluence Server before version 6.3.4 allows remote attackers to inject arbitrary HTML or JavaScript via a cross site scripting (XSS) vulnerability through the description of a macro.
Acknowledgements
Atlassian would like to credit Veit Hailperin (@fenceposterror) for reporting this issue to us.