High severity · published May 24, 2021
CVE-2021-24307
All in One SEO Pack < 4.1.0.2 - Admin RCE via unserialize
8.8
CVSS
53.3%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)53.3% · higher than 99% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AI
All in One SEO – Best WordPress SEO Plugin – Easily Improve Your SEO Rankings · All in One SEO Team
4.1.0.2 before 4.1.0.2 · source: vendor
AI
All IN One Seo · Aioseo
before 4.1.0.2 · source: NVD
Affected product
AI
All in One SEO – Best WordPress SEO Plugin – Easily Improve Your SEO Rankings
All in One SEO Team