AUGUST 4, 2026
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Case File

CVE-2021-24307

HIGH · CVSS 8.8 EPSS 53.27%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-05-24 · Last synced 2026-08-04

CyberRota Analysis

This is a high severity vulnerability with a CVSS score of 8.8. It affects WordPress. Its EPSS score suggests a 53.3% probability of exploitation in the next 30 days. Exploitation may require the attacker to be authenticated.

CVE
CVE-2021-24307
Severity
HIGH
CVSS
8.8
EPSS
53.27%
WordPress

Original NVD 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.

Related CVEs

Other vulnerabilities affecting the same vendor(s)