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XSS (via SVG file upload) in CuppaCMS #3
Affected software: CuppaCMS
Type of vulnerability: XSS (via SVG file upload)
Discovered by: BreachLock
Author: Balvinder Singh
Proof of concept:
Step1: Login to the cuppa cms.
Step3: Now open that file which was saved as 1.svg the below output will be shown.
According to the specification, add <script> inside SVG is not considered a vulnerability and we can give support to it. If any person wants to disable upload .svg because consider that is a security risk, they can go to settings/file and remove it from allowed extensions.
SVG is a special case because even experienced admins may take them for sole