{"id":"CVE-2021-45467","published":"2022-12-26T00:00:00Z","modified":"2025-04-12T00:06:13Z","title":"In CWP (aka Control Web Panel or CentOS Web Panel) before 0.9.8.1107, an unauthenticated attacker can use %00 bytes to…","vendor":null,"product":null,"tier":"core","eol":null,"description":{"text":"In CWP (aka Control Web Panel or CentOS Web Panel) before 0.9.8.1107, an unauthenticated attacker can use %00 bytes to cause /user/loader.php to register an arbitrary API key, as demonstrated by a /user/loader.php?api=1&scripts= .%00./.%00./api/account_new_create&acc=guadaapi URI. Any number of %00 instances can be used, e.g., .%00%00%00./.%00%00%00./api/account_new_create could also be used for the scripts parameter.","provenance":"source","from":"CVE.org"},"summary":{"text":"In Control Web Panel (CWP, also known as CentOS Web Panel), the flaw lies in the /user/loader.php component, where null-byte (%00) sequences in the scripts parameter are mishandled, leading to missing authorization checks. An unauthenticated remote attacker can exploit this over the network with no user interaction by sending a crafted request to /user/loader.php, using %00 bytes to cause an arbitrary API key to be registered, affecting versions before 0.9.8.1107.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-23T07:15:32Z"},"cvss":{"score":9.8,"severity":"CRITICAL","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","provenance":"source","from":"CISA ADP Vulnrichment"},"epss":{"score":0.70745,"percentile":0.99397,"date":"2026-10-31","provenance":"source"},"kev":null,"vulncheckKev":{"dateAdded":"2024-05-15","exploitedFirstSeen":"2024-05-15","ransomware":false,"evidence":[{"url":"https://web-assets.esetstatic.com/wls/en/papers/white-papers/ebury-is-alive-but-unseen.pdf","date":"2024-05-15"},{"url":"https://app.crowdsec.net/cti/cve-explorer/CVE-2021-45467","date":"2026-01-05"}],"evidenceTotal":2,"provenance":"source"},"exploited":true,"otx":null,"cwes":[{"id":"CWE-862","name":"Missing Authorization"}],"references":[{"url":"https://control-webpanel.com/changelog","tags":[]},{"url":"https://octagon.net/blog/2022/01/22/cve-2021-45467-cwp-centos-web-panel-preauth-rce/","tags":[]}],"techniques":[{"id":"T1190","name":"Exploit Public-Facing Application","tactics":["initial-access"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: Unauthenticated web request exploits public-facing application","mappingType":"exploitation_technique","evidence":[{"from":"description","quote":"an unauthenticated attacker can use %00 bytes to cause /user/loader.php","start":70,"end":141}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"},{"id":"T1136","name":"Create Account","tactics":["persistence"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: Creates new account/API credentials, enabling persistence","mappingType":"primary_impact","evidence":[{"from":"description","quote":"to register an arbitrary API key","start":142,"end":174}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"}],"reports":[{"id":"SRC-fc408b4e8863188154e1","title":"(eset):research","publisher":"web-assets.esetstatic.com","url":"https://web-assets.esetstatic.com/wls/en/papers/white-papers/ebury-is-alive-but-unseen.pdf","date":null,"mentions":[{"quote":"This pre-authentication file inclusion vulnerability is known as CVE-2021-45467, and was first documented publicly","start":18504,"end":18618}]}],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2021-32233","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2021-32233","exploited":false,"exploitedSince":null,"provenance":"source"},"exploits":[],"exploitSources":{"nuclei":[{"id":"CVE-2021-45467","name":"Control Web Panel (CWP) - File Inclusion","severity":"critical","path":"http/cves/2021/CVE-2021-45467.yaml","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-45467.yaml"}],"provenance":"source"},"exploitRefs":[],"flow":[{"stage":"exploitation","techniques":["T1190"],"provenance":"ai"},{"stage":"primary","techniques":["T1136"],"provenance":"ai"}],"timeline":[{"date":"2022-12-26","kind":"published","label":"Published (CVE.org)","url":"https://www.cve.org/CVERecord?id=CVE-2021-45467","provenance":"source"},{"date":"2024-05-15","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://web-assets.esetstatic.com/wls/en/papers/white-papers/ebury-is-alive-but-unseen.pdf","provenance":"source"}],"speed":{"daysToPublicExploit":null,"firstExploitFrom":null,"daysToKev":null},"priority":{"score":70.6,"factors":[{"name":"In a KEV catalog","points":35.0,"detail":"listed in VulnCheck KEV"},{"name":"Recent KEV listing","points":0.0,"detail":"added 900 days ago"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":19.88,"detail":"percentile 0.9940"},{"name":"Named in threat reports","points":3.87,"detail":"1 report"},{"name":"Public exploit code","points":5.0,"detail":"1 nuclei template"},{"name":"Mentioned in OTX pulses","points":0.0,"detail":"0 pulses"},{"name":"CVSS severity","points":6.86,"detail":"base score 9.8"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]}}