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 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.

Affected products

All In One Seo, Monolog

Aioseo All In One Seo

< 4.1.0.2

Fix

Available

CVSS 2.0

9.0 HIGH

CVSS 3.1

8.8 HIGH

EPSS

53.3% (99th percentile)

Weakness

CWE-502

NVD status

Modified

Published

2021-05-24