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CVE-2021-24307

HIGH 8.8 CVSS 3.1
Published
May 24, 2021
Last modified
June 17, 2026
NVD status
Modified
Reported by
contact@wpscan.com
Weakness
CWE-502
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

Affected WordPress components

  • All in One SEO – AI SEO Plugin to Boost SEO Rankings & Traffic (Schema, Local SEO, Sitemap & SEO Insights) Plugin · all-in-one-seo-pack
    Confirmed match Active
    From 4.1.0.2 (including) to 4.1.0.2 (excluding)
    View on WordPress.org

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • All in One SEO Team All in One SEO – Best WordPress SEO Plugin – Easily Improve Your SEO Rankings — From 4.1.0.2 (including) to 4.1.0.2 (excluding)
  • aioseo all_in_one_seo — Before 4.1.0.2

References

  • aioseo.com https://aioseo.com/changelog/ Release Notes, Vendor Advisory
  • wpscan.com https://wpscan.com/vulnerability/ab2c94d2-f6c4-418b-bd14-711ed164bcf1 Exploit, Third Party Advisory
  • nvd.nist.gov Official NVD record