The Rank Math SEO – AI SEO Tools to Dominate SEO Rankings plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 1.0.276 via deserialization of untrusted input in the updateMeta REST API endpoint. This makes it possible forauthenticated attackers, with Contributor-level access and above, to inject a PHP Object. The additional presence of a POP chain allows attackers to achieve remote code execution by writing a webshell to the uploads directory.

Rank Math SEO PRO for WordPress is affected by a supply-chain compromise in a subset of version 3.0.123 packages downloaded or updated between October 15, 2026 at 20:02 UTC and October 16, 2026 at 07:12 UTC. Rank Math states that the affected plugin files contained malware that could compromise a website if the plugin was activated and directs sites that activated an affected package to treat the website as compromised. The malware may establish persistent access, communicate with rank1cdn[.]com, recreate hidden backdoors on page visits, and expose WordPress credentials, database credentials, API keys, and other secrets accessible to the web server. Rank Math identifies three malicious wpoptions keys, hidden PHP backdoors, unauthorized administrator accounts, a fake WordPress core file, PHP-executable .cache files, and a system cron marker as incident indicators. Only packages obtained during the vendor-confirmed window are claimed as affected; version 3.0.123 alone is not sufficient to establish compromise. Rank Math removed the affected files and released version 3.0.124 as the clean replacement.

The Rank Math SEO WordPress plugin before 1.0.280 does not perform a capability or nonce check before clearing its stored SEO analysis data, allowing unauthenticated users to delete it.

The Rank Math SEO WordPress plugin before 1.0.280 does not properly sanitise and escape a parameter before using it in a SQL query, allowing high-privilege users such as administrators to perform SQL injection attacks.

The Rank Math SEO WordPress plugin before 1.0.280 does not correctly validate the type of a file uploaded through its settings import feature, allowing users with administrator-level access to upload a PHP file and achieve remote code execution.

The Rank Math SEO WordPress plugin before 1.0.280 does not escape a stored redirection source value before outputting it in an administrative list view, allowing users who can manage redirections (Administrators by default) to store JavaScript that executes in the session of any user who later opens that view, including a Super Administrator on multisite.

The Rank Math SEO WordPress plugin before 1.0.277 does not verify that the requesting user is permitted to read the specific post referenced in a request before returning its content and SEO metadata, allowing users with the Author role and above to read the title, body and metadata of other users' non-public posts.

The Rank Math SEO WordPress plugin before 1.0.277 does not verify that a user is allowed to edit the object being modified before updating its SEO indexing metadata, allowing users with the Author role and above to alter that metadata on content, taxonomy terms and user profiles they do not own, and to remove other users' content from the site's sitemap and search engine index.

The Rank Math SEO WordPress plugin before 1.0.277 does not perform a capability check when bulk metadata updates target taxonomy terms, and reuses the supplied object identifier across object types, allowing users with the Author role and above to modify the SEO metadata of terms they cannot edit and to overwrite the titles of posts belonging to other users.

The Rank Math SEO WordPress plugin before 1.0.277.1 does not check whether a post is password protected before using its content to build publicly generated SEO metadata, allowing unauthenticated users to read the content of password-protected posts.

The Rank Math SEO – AI SEO Tools to Dominate SEO Rankings plugin for WordPress is vulnerable to unauthorized access due to a missing capability check on the updatesiteeditorhomepage function in all versions up to, and including, 1.0.271. This makes it possible for unauthenticated attackers to modify several plugin settings including homepage title, meta description, breadcrumbs label, and social media metadata, which can have severe impact on SEO rankings and display malicious content across all site pages where breadcrumbs are used.

Missing Authorization vulnerability in Rank Math Rank Math SEO PRO allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Rank Math SEO PRO: from n/a through 3.0.95.

Insertion of Sensitive Information Into Sent Data vulnerability in Rank Math SEO Rank Math SEO seo-by-rank-math allows Retrieve Embedded Sensitive Data.This issue affects Rank Math SEO: from n/a through <= 1.0.252.1.

Missing Authorization vulnerability in Rank Math SEO Rank Math SEO seo-by-rank-math allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Rank Math SEO: from n/a through <= 1.0.252.1.

The Rank Math SEO – AI SEO Tools to Dominate SEO Rankings plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's Rank Math API in all versions up to, and including, 1.0.235 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Improper Control of Generation of Code ('Code Injection') vulnerability in Rank Math SEO Rank Math SEO seo-by-rank-math allows Code Injection.This issue affects Rank Math SEO: from n/a through <= 1.0.231.

The Rank Math SEO – AI SEO Tools to Dominate SEO Rankings plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 1.0.228 via deserialization of untrusted input 'setredirections' function. This makes it possible for authenticated attackers, with Administrator-level access and above, to inject a PHP Object. No known POP chain is present in the vulnerable software. If a POP chain is present via an additional plugin or theme installed on the target system, it could allow the attacker to delete arbitrary files, retrieve sensitive data, or execute code.

The Rank Math SEO – AI SEO Tools to Dominate SEO Rankings plugin for WordPress is vulnerable to unauthorized modification and loss of data due to a missing capability check on the 'updatemetadata' function in all versions up to, and including, 1.0.228. This makes it possible for unauthenticated attackers to insert new and update existing metadata beginning with 'rankmath', and delete arbitrary existing user metadata and term metadata. Deleting existing usermeta can cause a loss of access to the administrator dashboard for any registered users, including Administrators.

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in Rank Math Rank Math SEO allows Path Traversal.This issue affects Rank Math SEO: from n/a through 1.0.107.2.

The Rank Math SEO with AI Best SEO Tools plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘id’ parameter in versions up to, and including, 1.0.218 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

The Rank Math SEO with AI Best SEO Tools plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘textAlign’ parameter in versions up to, and including, 1.0.217 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with contributor-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

The Rank Math SEO with AI SEO Tools plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's HowTo and FAQ widgets in all versions up to, and including, 1.0.216 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

The Rank Math SEO with AI SEO Tools plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the HowTo block attributes in all versions up to, and including, 1.0.214 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.