{"id":"CVE-2021-24307","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-24307","generatedAt":"2026-10-28T01:52:09.007Z","title":"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.","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.","published":"2021-05-24T11:15:08.000Z","lastModified":"2026-06-17T03:39:48.000Z","status":"Modified","sourceIdentifier":"contact@wpscan.com","cvss":{"version":"3.1","score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-502"],"affected":["aioseo/all in one seo"],"epss":{"score":0.53274,"percentile":0.98976,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 53.3%, higher than 99% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"https://aioseo.com/changelog/","tags":["Release Notes","Vendor Advisory"],"source":"contact@wpscan.com"},{"url":"https://wpscan.com/vulnerability/ab2c94d2-f6c4-418b-bd14-711ed164bcf1","tags":["Exploit","Third Party Advisory"],"source":"contact@wpscan.com"},{"url":"https://aioseo.com/changelog/","tags":["Release Notes","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://wpscan.com/vulnerability/ab2c94d2-f6c4-418b-bd14-711ed164bcf1","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-24307","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}