The Competition Form WordPress plugin through 2.0 does not sanitise and escape a parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting which could be used against high privilege users such as admin.
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
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https://wpscan.com/vulnerability/478316b9-9f47-4aa6-92c6-03879f16a3e5/ | exploit vdb entry third party advisory technical description |