CVE-2021-24307
high-risk
Published 2021-05-24
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.
Do I need to act?
!
41.8% chance of exploitation in next 30 days
EPSS score — higher than 58% of all CVEs
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
8
CVSS 8.8/10
High
NETWORK
/ LOW complexity
Affected Products (1)
All In One Seo
Affected Vendors
References (4)
52
/ 100
high-risk
Severity
30/34 · Critical
Exploitability
17/34 · Moderate
Exposure
5/34 · Minimal