CVE-2021-24307: 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 execu...

Summary

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 arbitrary code on the underlying host. Users can restore plugin's configuration by uploading a backu...

What to do

Update aioseo all_in_one_seo to version 4.1.0.2 or later.

Affected software

Vendor	Product	Affected versions
aioseo	all_in_one_seo	< 4.1.0.2 `cpe:2.3:a:aioseo:all_in_one_seo::::::wordpress::*`

Original advisory text

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 execu...

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 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.

References

https://aioseo.com/changelog/ Release Notes Vendor Advisory
https://wpscan.com/vulnerability/ab2c94d2-f6c4-418b-bd14-711ed164bcf1 Exploit Third Party Advisory