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GHSA-8fm5-gg2f-f66q
No affected components available
Summary
A publisher on a publify application is able to perform a cross-site scripting attack on an administrator using the redirect functionality.
Details
A publisher on a publify application is able to perform a cross-site scripting attack on an administrator using the redirect functionality. The exploitation of this XSS vulnerability requires the administrator to click a malicious link.
We can create a redirect to a javascript:alert() URL. Whilst the redirect itself doesn't work, on the administrative panel, an a tag is created with the payload as the URI. Upon clicking this link, the XSS is triggered.
An attack could attempt to hide their payload by using HTML, or other encodings, as to not make it obvious to an administrator that this is a malicious link.
PoC
A publisher can create a new redirect as shown below. The payload used is javascript:alert().
An administrator will now see this redirect in their overview of the page.
If they click the link on the right, it triggers the XSS.
Impact
A publisher may attempt to use this vulnerability to escalate their privileges and become an administrator.
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker needs high-level or administrative privileges.
Limited exploitation activity has been observed. Close monitoring and planned remediation are recommended.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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