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Unauthenticated shortcode injection in the All in One SEO (AIOSEO) WordPress plugin before 5.0.2.1 lets remote attackers smuggle registered shortcodes past the plugin's shortcode-stripping routine and have them executed in content derived from user input; on sites upgraded from older plugin versions the stripping protection is disabled entirely, so no crafted payload is required. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N, 6.5) reflects unauthenticated, no-interaction reachability with limited confidentiality and integrity impact rather than full compromise, and the practical severity depends on which shortcodes are registered on the target (from the plugin, theme, or other plugins). Publicly available exploit code exists and a vendor patch is available in 5.0.2.1; there is no evidence of confirmed active exploitation (no CISA KEV listing), so this is best treated as a moderate-priority, patched issue with a public PoC.
Stored Cross-Site Scripting in the All in One SEO WordPress plugin before version 5.0.0.1 enables users holding the contributor role or above to inject persistent malicious scripts into post content that execute in the browser of any higher-privileged user who subsequently edits that post. The attack effectively allows a low-trust contributor to hijack administrator sessions, enabling full site compromise. A publicly available proof-of-concept from WPScan exists, and the plugin's broad deployment across millions of WordPress installations amplifies aggregate exposure.
Incorrect authorization on REST API endpoints in the All in One SEO WordPress plugin (before 4.9.9) allows authenticated users with low-level roles such as Contributor to overwrite or reset the site-wide AI integration configuration. The flaw is classified under CWE-863 (Incorrect Authorization), meaning the plugin registers REST API routes without enforcing appropriate role checks before permitting state-modifying operations. A publicly available proof-of-concept exists per WPScan, though no active exploitation has been confirmed by CISA KEV. The practical blast radius is limited to integrity of the plugin's AI settings, with no evidence of confidentiality or availability impact.
The All in One SEO - Powerful SEO Plugin to Boost SEO Rankings & Increase Traffic plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the post Meta Description and Canonical URL. Rated medium severity (CVSS 6.4), this vulnerability is remotely exploitable, low attack complexity. This Cross-Site Scripting (XSS) vulnerability could allow attackers to inject malicious scripts into web pages viewed by other users.
The All in One SEO WordPress plugin before 4.6.1.1 does not validate and escape some of its Post fields before outputting them back, which could allow users with the contributor role and above to. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
The All in One SEO - Best WordPress SEO Plugin - Easily Improve SEO Rankings & Increase Traffic plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's shortcode(s) in all. Rated medium severity (CVSS 6.4), this vulnerability is remotely exploitable, low attack complexity. This Cross-Site Scripting (XSS) vulnerability could allow attackers to inject malicious scripts into web pages viewed by other users.
The All in One SEO Pack plugin for WordPress is vulnerable to Stored Cross-Site Scripting via multiple parameters in versions up to, and including, 4.2.9 due to insufficient input sanitization and. Rated medium severity (CVSS 6.4), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
The All in One SEO Pack plugin for WordPress is vulnerable to Stored Cross-Site Scripting via multiple parameters in versions up to, and including, 4.2.9 due to insufficient input sanitization and. Rated medium severity (CVSS 4.4), this vulnerability is remotely exploitable. No vendor patch available.
Server Side Request Forgery (SSRF) vulnerability in All in One SEO Pro plugin <= 4.2.5.1 on WordPress. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Multiple Cross-Site Request Forgery (CSRF) vulnerabilities in All in One SEO plugin <= 4.2.3.1 at WordPress. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
The All in One SEO - Best WordPress SEO Plugin - Easily Improve Your SEO Rankings before 4.1.0.2 enables authenticated users with "aioseo_tools_settings" privilege (most of the time admin) to execute. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.
Unauthenticated shortcode injection in the All in One SEO (AIOSEO) WordPress plugin before 5.0.2.1 lets remote attackers smuggle registered shortcodes past the plugin's shortcode-stripping routine and have them executed in content derived from user input; on sites upgraded from older plugin versions the stripping protection is disabled entirely, so no crafted payload is required. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N, 6.5) reflects unauthenticated, no-interaction reachability with limited confidentiality and integrity impact rather than full compromise, and the practical severity depends on which shortcodes are registered on the target (from the plugin, theme, or other plugins). Publicly available exploit code exists and a vendor patch is available in 5.0.2.1; there is no evidence of confirmed active exploitation (no CISA KEV listing), so this is best treated as a moderate-priority, patched issue with a public PoC.
Stored Cross-Site Scripting in the All in One SEO WordPress plugin before version 5.0.0.1 enables users holding the contributor role or above to inject persistent malicious scripts into post content that execute in the browser of any higher-privileged user who subsequently edits that post. The attack effectively allows a low-trust contributor to hijack administrator sessions, enabling full site compromise. A publicly available proof-of-concept from WPScan exists, and the plugin's broad deployment across millions of WordPress installations amplifies aggregate exposure.
Incorrect authorization on REST API endpoints in the All in One SEO WordPress plugin (before 4.9.9) allows authenticated users with low-level roles such as Contributor to overwrite or reset the site-wide AI integration configuration. The flaw is classified under CWE-863 (Incorrect Authorization), meaning the plugin registers REST API routes without enforcing appropriate role checks before permitting state-modifying operations. A publicly available proof-of-concept exists per WPScan, though no active exploitation has been confirmed by CISA KEV. The practical blast radius is limited to integrity of the plugin's AI settings, with no evidence of confidentiality or availability impact.
The All in One SEO - Powerful SEO Plugin to Boost SEO Rankings & Increase Traffic plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the post Meta Description and Canonical URL. Rated medium severity (CVSS 6.4), this vulnerability is remotely exploitable, low attack complexity. This Cross-Site Scripting (XSS) vulnerability could allow attackers to inject malicious scripts into web pages viewed by other users.
The All in One SEO WordPress plugin before 4.6.1.1 does not validate and escape some of its Post fields before outputting them back, which could allow users with the contributor role and above to. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
The All in One SEO - Best WordPress SEO Plugin - Easily Improve SEO Rankings & Increase Traffic plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's shortcode(s) in all. Rated medium severity (CVSS 6.4), this vulnerability is remotely exploitable, low attack complexity. This Cross-Site Scripting (XSS) vulnerability could allow attackers to inject malicious scripts into web pages viewed by other users.
The All in One SEO Pack plugin for WordPress is vulnerable to Stored Cross-Site Scripting via multiple parameters in versions up to, and including, 4.2.9 due to insufficient input sanitization and. Rated medium severity (CVSS 6.4), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
The All in One SEO Pack plugin for WordPress is vulnerable to Stored Cross-Site Scripting via multiple parameters in versions up to, and including, 4.2.9 due to insufficient input sanitization and. Rated medium severity (CVSS 4.4), this vulnerability is remotely exploitable. No vendor patch available.
Server Side Request Forgery (SSRF) vulnerability in All in One SEO Pro plugin <= 4.2.5.1 on WordPress. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Multiple Cross-Site Request Forgery (CSRF) vulnerabilities in All in One SEO plugin <= 4.2.3.1 at WordPress. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
The All in One SEO - Best WordPress SEO Plugin - Easily Improve Your SEO Rankings before 4.1.0.2 enables authenticated users with "aioseo_tools_settings" privilege (most of the time admin) to execute. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.