The VK Blocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'vk-blocks/ancestor-page-list' block in all versions up to, and including, 1.63.0.1 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers with contributor-level and above permissions to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

The VK Blocks plugin for WordPress is vulnerable to improper authorization via the REST 'update_options' function in versions up to, and including, 1.57.0.5. This allows authenticated attackers, with contributor-level permissions or above, to change the 'vk_font_awesome_version' option to an arbitrary value.

The VK Blocks plugin for WordPress is vulnerable to improper authorization via the REST 'update_vk_blocks_options' function in versions up to, and including, 1.57.0.5. This allows authenticated attackers, with contributor-level permissions or above, to change plugin settings including default icons.

Cross-site scripting vulnerability in Post function of VK Blocks 1.53.0.1 and earlier and VK Blocks Pro 1.53.0.1 and earlier allows a remote authenticated attacker to inject an arbitrary script.

Cross-site scripting vulnerability in Tag edit function of VK Blocks 1.53.0.1 and earlier and VK Blocks Pro 1.53.0.1 and earlier allows a remote authenticated attacker to inject an arbitrary script.