The WP-ShowHide WordPress plugin before 1.05 does not validate and escape some of its shortcode attributes before outputting them back in the page, which could allow users with a role as low as contributor to perform Stored Cross-Site Scripting attacks which could be used against high privilege users such as admins.
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https://wpscan.com/vulnerability/a2758983-d3a7-4718-b5b8-30169df6780a | exploit vdb entry third party advisory technical description |