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SS-2016-001: XSS in CMSController BackURL

Severity:
Important (?)
Identifier:
SS-2016-001
Versions Affected:
3.1.18, 3.2.3, 3.3.1
Versions Fixed:
3.1.19, 3.2.4, 3.3.2
Release Date:
2016-05-11

A XSS risk exists in the returnURL parameter passed to CMSSecurity/success. An unvalidated url could cause the user to redirect to an unverified third party url outside of the site.

Credit: David Júlio for reporting.