{"id":"CVE-2026-16618","state":"PUBLISHED","title":"ImproveSEO <= 2.0.11 - Unauthenticated Arbitrary File Upload Leading to Remote Code Execution","description":"The Improve SEO WordPress plugin through 2.0.11 does not properly validate uploaded files, checking only the file content type while writing the file with the attacker-supplied extension into a publicly accessible directory, allowing unauthenticated users to upload executable PHP files and achieve remote code execution.","publishedAt":"2026-08-04T06:00:08.334Z","updatedAt":"2026-08-04T17:40:09.473Z","severity":{"score":9.8,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","source":"CISA-ADP"},"assigner":"WPScan","products":["Unknown Improve SEO"],"affected":[{"vendor":"Unknown","product":"Improve SEO","defaultStatus":"unknown","versions":[{"version":"0","status":"affected","lessThanOrEqual":"2.0.11","versionType":"semver"}]}],"references":["https://wpscan.com/vulnerability/3754d4c0-1b67-49a4-a29a-7169446638d1/"],"weaknesses":["CWE-434"],"ingestedAt":"2026-10-29T20:11:00.674Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/16xxx/CVE-2026-16618.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-16618","state":"PUBLISHED","datePublished":"2026-08-04T06:00:08.334Z","dateUpdated":"2026-08-04T17:40:09.473Z","assignerShortName":"WPScan","assignerOrgId":"1bfdd5d7-9bf6-4a53-96ea-42e2716d7a81","dateReserved":"2026-07-22T14:45:28.693Z"},"containers":{"cna":{"title":"ImproveSEO <= 2.0.11 - Unauthenticated Arbitrary File Upload Leading to Remote Code Execution","descriptions":[{"lang":"en","value":"The Improve SEO WordPress plugin through 2.0.11 does not properly validate uploaded files, checking only the file content type while writing the file with the attacker-supplied extension into a publicly accessible directory, allowing unauthenticated users to upload executable PHP files and achieve remote code execution."}],"affected":[{"vendor":"Unknown","product":"Improve SEO","defaultStatus":"unknown","versions":[{"version":"0","status":"affected","lessThanOrEqual":"2.0.11","versionType":"semver"}]}],"references":[{"url":"https://wpscan.com/vulnerability/3754d4c0-1b67-49a4-a29a-7169446638d1/","tags":["exploit","vdb-entry","technical-description"]}],"problemTypes":[{"descriptions":[{"description":"CWE-434 Unrestricted Upload of File with Dangerous Type","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"WPScan","orgId":"1bfdd5d7-9bf6-4a53-96ea-42e2716d7a81","dateUpdated":"2026-08-04T06:00:08.334Z"},"credits":[{"lang":"en","value":"João Ramos Maciel","type":"finder"},{"lang":"en","value":"WPScan","type":"coordinator"}],"source":{"discovery":"EXTERNAL"},"x_generator":{"engine":"WPScan CVE Generator"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":9.8,"attackVector":"NETWORK","baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-08-04T17:39:47.820539Z","id":"CVE-2026-16618","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-434","type":"CWE","lang":"en","description":"CWE-434 Unrestricted Upload of File with Dangerous Type"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-04T17:40:09.473Z"}}]}}}