{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-121491", "assignerOrgId": "1bfdd5d7-9bf6-4a53-96ea-42e2716d7a81", "state": "PUBLISHED", "assignerShortName": "WPScan", "dateReserved": "2026-11-03T14:07:07.923Z", "datePublished": "2026-11-07T06:00:26.885Z", "dateUpdated": "2026-11-07T06:00:26.885Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "1bfdd5d7-9bf6-4a53-96ea-42e2716d7a81", "shortName": "WPScan", "dateUpdated": "2026-11-07T06:00:26.885Z"}, "title": "Fiber Admin 3.1.0 - 4.0.0 - Unauthenticated RCE via Host Header", "problemTypes": [{"descriptions": [{"description": "CWE-94 Improper Control of Generation of Code ('Code Injection')", "lang": "en", "type": "CWE"}]}], "affected": [{"vendor": "Unknown", "product": "Fiber Admin", "versions": [{"status": "affected", "versionType": "semver", "version": "3.1.0", "lessThan": "4.0.1"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "The Fiber Admin WordPress plugin before 4.0.1 does not validate or escape a request header before writing it into a PHP file it regenerates on an unprotected admin hook, allowing unauthenticated attackers to execute arbitrary code when its custom database error page is enabled and they win a race against an administrator saving its settings."}], "references": [{"url": "https://wpscan.com/vulnerability/42b9773d-9c69-4435-be20-ae86f52b4608/", "tags": ["exploit", "vdb-entry", "technical-description"]}], "credits": [{"lang": "en", "value": "Naoki Kawahigashi", "type": "finder"}, {"lang": "en", "value": "WPScan", "type": "coordinator"}], "source": {"discovery": "EXTERNAL"}, "x_generator": {"engine": "WPScan CVE Generator"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Fiber Admin", "vendor": "Unknown", "versions": [{"lessThan": "4.0.1", "status": "affected", "version": "3.1.0", "versionType": "semver"}]}], "source": "contact@wpscan.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The Fiber Admin WordPress plugin before 4.0.1 does not validate or escape a request header before writing it into a PHP file it regenerates on an unprotected admin hook, allowing unauthenticated attackers to execute arbitrary code when its custom database error page is enabled and they win a race against an administrator saving its settings."}], "id": "CVE-2026-121491", "lastModified": "2026-11-07T06:16:58.280", "metrics": {}, "published": "2026-11-07T06:16:58.280", "references": [{"source": "contact@wpscan.com", "url": "https://wpscan.com/vulnerability/42b9773d-9c69-4435-be20-ae86f52b4608/"}], "sourceIdentifier": "contact@wpscan.com", "vulnStatus": "Received"}

{}

{}