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In Winter CMS versions prior to 1.2.3, users with the 'backend.manage_branding' permission could upload SVG files as application logos without proper sanitization. This allowed for the possibility of a stored cross-site scripting (XSS) attack if a malicious SVG was uploaded. However, exploitation required the attacker to already possess developer or super user privileges, and for the victim to visit the direct URL of the uploaded SVG, with the application serving files from local storage under the same domain.
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No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
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