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 perform Stored Cross-Site Scripting attacks
A Cross-site Scripting (XSS) vulnerability exists in the All in One SEO Pack plugin before 2.0.3.1 for WordPress via the Search parameter.
The Semper Fi All in One SEO Pack plugin before 2.2.6 for WordPress does not consider the presence of password protection during generation of the Meta Description field, which allows remote attackers to obtain sensitive information by reading HTML source code.
The all-in-one-seo-pack plugin before 3.2.7 for WordPress (aka All in One SEO Pack) is susceptible to Stored XSS due to improper encoding of the SEO-specific description for posts provided by the plugin via unsafe placeholder replacement.
An issue was discovered in the All in One SEO Pack plugin before 3.6.2 for WordPress. The SEO Description and Title fields are vulnerable to unsanitized input from a Contributor, leading to stored XSS.
The All in One SEO WordPress plugin before 4.1.5.3 is affected by an authenticated SQL injection issue, which was discovered during an internal audit by the Jetpack Scan team, and could grant attackers access to privileged information from the affected site’s database (e.g., usernames and hashed passwords).
The All in One SEO WordPress plugin before 4.1.5.3 is affected by a Privilege Escalation issue, which was discovered during an internal audit by the Jetpack Scan team, and may grant bad actors access to protected REST API endpoints they shouldn’t have access to. This could ultimately enable users with low-privileged accounts, like subscribers, to perform remote code execution on affected sites.
The All in One SEO – Best WordPress SEO Plugin – Easily Improve Your SEO Rankings before 4.1.0.2 enables authenticated users with "aioseotoolssettings" privilege (most of the time admin) to execute arbitrary code on the underlying host. Users can restore plugin's configuration by uploading a backup .ini file in the section "Tool > Import/Export". However, the plugin attempts to unserialize values of the .ini file. Moreover, the plugin embeds Monolog library which can be used to craft a gadget chain and thus trigger system command execution.