The SEOPress – On-site SEO plugin for WordPress is vulnerable to Reflected Cross-Site Scripting due to the use of add_query_arg & remove_query_arg without appropriate escaping on the URL in all versions up to, and including, 8.1.1. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.

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The SEOPress WordPress plugin before 7.9 does not properly protect some of its REST API routes, which combined with another Object Injection vulnerability can allow unauthenticated attackers to unserialize malicious gadget chains, compromising the site if a suitable chain is present.

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The SEOPress WordPress plugin before 7.8 does not validate and escape one of its Post settings, which could allow contributor and above role to perform Open redirect attacks against any user viewing a malicious post

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The SEOPress WordPress plugin before 7.8 does not sanitise and escape some of its Post settings, which could allow high privilege users such as contributor to perform Stored Cross-Site Scripting attacks.

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The SEOPress – On-site SEO plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's social image URL in all versions up to, and including, 7.9 due to insufficient input sanitization and output escaping on user supplied image URLs. 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.

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The SEOPress – On-site SEO plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the SEO title and description parameters as well as others in all versions up to, and including, 7.5.2.1 due to insufficient input sanitization and output escaping. This makes it possible for attackers, with contributor access or higher, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

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Authorization Bypass Through User-Controlled Key vulnerability in The SEO Guys at SEOPress SEOPress.This issue affects SEOPress: from n/a through 7.7.1.

The SEOPress – On-site SEO plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the image alt parameter in all versions up to, and including, 7.5.2.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with author access or higher, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

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The SEOPress WordPress plugin before 7.3 does not sanitise and escape some of its settings, which could allow high privilege users such as admin to perform Cross-Site Scripting attacks even when unfiltered_html is disallowed

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The SEOPress WordPress plugin before 6.5.0.3 unserializes user input provided via the settings, which could allow high-privilege users such as admin to perform PHP Object Injection when a suitable gadget is present.

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The SEOPress WordPress plugin is vulnerable to Stored Cross-Site-Scripting via the processPut function found in the ~/src/Actions/Api/TitleDescriptionMeta.php file which allows authenticated attackers to inject arbitrary web scripts, in versions 5.0.0 - 5.0.3.

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