[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fmcNgINAxy1kgNaniH-mPSqzY5Qlu0nJt6eRhWzvOuuM":3,"g5a-risk:CVE-2021-22881":156},{"success":4,"data":5,"meta":154},true,{"cveId":6,"title":7,"description":8,"shortDescription":9,"publishedDate":10,"lastModified":11,"cvssScore":12,"cvssVector":13,"cvssMetrics":14,"epssScore":39,"epssPercentile":27,"epssTimeSeries":40,"severity":41,"affectedProducts":42,"affectedProductsCount":53,"references":54,"referencesCount":87,"weaknesses":88,"weaknessesCount":97,"isActivelyExploited":98,"cisaInfo":27,"otxData":27,"relatedBlogPosts":99,"seoMetadata":100,"configurations":125,"relatedVendorCves":145,"notableEvents":146},"CVE-2021-22881","What is CVE-2021-22881?","The Host Authorization middleware in Action Pack before 6.1.2.1, 6.0.3.5 suffers from an open redirect vulnerability. Specially crafted `Host` headers in combination with certain \"allowed host\" formats can cause the Host Authorization middleware in Action Pack to redirect users to a malicious website. Impacted applications will have allowed hosts with a leading dot. When an allowed host contains a leading dot, a specially crafted `Host` header can be used to redirect to a malicious website.","The Host Authorization middleware in Action Pack before 6.1.2.1, 6.0.3.5 suffers from an open redirect vulnerability. Specially crafted `Host` headers in com...","2021-02-11T18:15:17.46","2023-11-07T03:30:27.547",6.1,"CVSS:3.1\u002FAV:N\u002FAC:L\u002FPR:N\u002FUI:R\u002FS:C\u002FC:L\u002FI:L\u002FA:N",{"CVSSMetricV31":15,"CVSSMetricV30":27,"CVSSMetricV2":30,"CVSSMetricV40":27},[16],{"Source":17,"Type":18,"CVSSData":19,"ExploitabilityScore":28,"ImpactScore":29},"nvd@nist.gov","Primary",{"Version":20,"VectorString":13,"AttackVector":21,"AttackComplexity":22,"PrivilegesRequired":23,"UserInteraction":24,"Scope":25,"ConfidentialityImpact":22,"IntegrityImpact":22,"AvailabilityImpact":23,"BaseScore":12,"BaseSeverity":26,"ExploitCodeMaturity":27,"RemediationLevel":27,"ReportConfidence":27,"TemporalScore":27,"TemporalSeverity":27,"ConfidentialityRequirement":27,"IntegrityRequirement":27,"AvailabilityRequirement":23,"ModifiedAttackVector":27,"ModifiedAttackComplexity":27,"ModifiedPrivilegesRequired":27,"ModifiedUserInteraction":27,"ModifiedScope":27,"ModifiedConfidentialityImpact":27,"ModifiedIntegrityImpact":27,"ModifiedAvailabilityImpact":27,"EnvironmentalScore":27,"EnvironmentalSeverity":27},"3.1","NETWORK","LOW","NONE","REQUIRED","CHANGED","MEDIUM",null,2.8,2.7,[31],{"Source":17,"Type":18,"CVSSData":32,"BaseSeverity":26,"ExploitabilityScore":37,"ImpactScore":38,"ACInsufInfo":27,"ObtainAllPrivilege":27,"ObtainUserPrivilege":27,"ObtainOtherPrivilege":27,"UserInteractionRequired":4},{"Version":33,"VectorString":34,"AccessVector":21,"AccessComplexity":26,"Authentication":23,"ConfidentialityImpact":35,"IntegrityImpact":35,"AvailabilityImpact":23,"BaseScore":36,"BaseSeverity":27,"Exploitability":27,"RemediationLevel":27,"ReportConfidence":27,"TemporalScore":27,"CollateralDamagePotential":27,"TargetDistribution":27,"ConfidentialityRequirement":27,"IntegrityRequirement":27,"AvailabilityRequirement":27,"EnvironmentalScore":27},"2.0","AV:N\u002FAC:M\u002FAu:N\u002FC:P\u002FI:P\u002FA:N","PARTIAL",5.8,8.6,4.9,0.87301,[39,39,39,39,39,39,39],"Medium",[43,48],{"vendor":44,"product":45,"version":46,"criteria":47,"vulnerable":4},"rubyonrails","rails","*","cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*",{"vendor":49,"product":50,"version":51,"criteria":52,"vulnerable":4},"fedoraproject","fedora","33","cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*",2,[55,62,65,70,74,79,83],{"url":56,"source":57,"tags":58},"http:\u002F\u002Fwww.openwall.com\u002Flists\u002Foss-security\u002F2021\u002F05\u002F05\u002F2","Openwall",[59,60,61],"Mailing List","Mitigation","Third Party Advisory",{"url":63,"source":57,"tags":64},"http:\u002F\u002Fwww.openwall.com\u002Flists\u002Foss-security\u002F2021\u002F08\u002F20\u002F1",[59,60,61],{"url":66,"source":57,"tags":67},"http:\u002F\u002Fwww.openwall.com\u002Flists\u002Foss-security\u002F2021\u002F12\u002F14\u002F5",[68,59,69],"Exploit","Patch",{"url":71,"source":72,"tags":73},"https:\u002F\u002Fbenjamin-bouchet.com\u002Fcve-2021-22881-faille-de-securite-dans-le-middleware-hostauthorization\u002F","Benjamin-bouchet",[69,61],{"url":75,"source":76,"tags":77},"https:\u002F\u002Fdiscuss.rubyonrails.org\u002Ft\u002Fcve-2021-22881-possible-open-redirect-in-host-authorization-middleware\u002F77130","Rubyonrails",[60,69,78],"Vendor Advisory",{"url":80,"source":81,"tags":82},"https:\u002F\u002Fhackerone.com\u002Freports\u002F1047447","Hackerone",[68,69,61],{"url":84,"source":85,"tags":86},"https:\u002F\u002Flists.fedoraproject.org\u002Farchives\u002Flist\u002Fpackage-announce%40lists.fedoraproject.org\u002Fmessage\u002FXQ3NS4IBYE2I3MVMGAHFZBZBIZGHXHT3\u002F","Fedoraproject",[],7,[89],{"id":90,"name":91,"description":92,"extendedDescription":93,"status":94,"abstraction":95,"structure":96},"CWE-601","URL Redirection to Untrusted Site ('Open Redirect')","A web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a Redirect. This simplifies phishing attacks.","An http parameter may contain a URL value and could cause the web application to redirect the request to the specified URL. By modifying the URL value to a malicious site, an attacker may successfully launch a phishing scam and steal user credentials. Because the server name in the modified link is identical to the original site, phishing attempts have a more trustworthy appearance. Whether this issue poses a vulnerability will be subject to the intended behavior of the application. For example, a search engine might intentionally provide redirects to arbitrary URLs.","Draft","Base","Simple",1,false,[],{"title":101,"metaDescription":102,"keywords":103,"canonicalUrl":104,"structuredData":105},"What is CVE-2021-22881? Vulnerability Analysis | Security Advisory | Precursor Intelligence","Comprehensive analysis of CVE-2021-22881, a medium severity cyber security vulnerability from 2021. High exploit probability (87.3%). The Host Authorization ...","CVE-2021-22881, CVE-2021-22881 vulnerability, CVE-2021-22881 security, medium severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research, vulnerability assessment, cyber threats, 2021, CVSS score, exploit, patch, remediation, rubyonrails security, fedoraproject security, rails vulnerability, fedora vulnerability, high risk vulnerability, actively exploited, exploit available","\u002Fwhat-is\u002Fcve-2021-22881",{"@context":106,"@type":107,"headline":101,"description":102,"datePublished":10,"dateModified":11,"author":108,"publisher":112,"about":116,"mainEntityOfPage":120,"articleSection":123,"keywords":124},"https:\u002F\u002Fschema.org","TechArticle",{"@type":109,"name":110,"url":111},"Organization","Precursor Intelligence","https:\u002F\u002Fprecursorintelligence.com",{"@type":109,"name":110,"url":111,"logo":113},{"@type":114,"url":115},"ImageObject","https:\u002F\u002Fprecursorintelligence.com\u002Fimg\u002Flogos\u002Feplogo.png",{"@type":117,"name":6,"description":118,"additionalType":119},"Thing","Cybersecurity Vulnerability","https:\u002F\u002Fschema.org\u002FSoftwareBug",{"@type":121,"@id":122},"WebPage","https:\u002F\u002Fprecursorintelligence.com\u002Fwhat-is\u002Fcve-2021-22881","Cybersecurity","CVE-2021-22881, CVE-2021-22881 vulnerability, CVE-2021-22881 security, medium severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research",[126,139],{"Operator":27,"Negate":27,"Nodes":127},[128],{"Operator":129,"Negate":27,"CPEMatch":130},"OR",[131,135],{"Vulnerable":4,"Criteria":47,"MatchCriteriaID":132,"VersionStartExcluding":27,"VersionStartIncluding":133,"VersionEndExcluding":134,"VersionEndIncluding":27},"817BE0F5-136C-460E-816D-74B3F6663BA8","6.0.0","6.0.3.5",{"Vulnerable":4,"Criteria":47,"MatchCriteriaID":136,"VersionStartExcluding":27,"VersionStartIncluding":137,"VersionEndExcluding":138,"VersionEndIncluding":27},"98CE6993-089E-454B-8156-011E03FC3C94","6.1.0","6.1.2.1",{"Operator":27,"Negate":27,"Nodes":140},[141],{"Operator":129,"Negate":27,"CPEMatch":142},[143],{"Vulnerable":4,"Criteria":52,"MatchCriteriaID":144,"VersionStartExcluding":27,"VersionStartIncluding":27,"VersionEndExcluding":27,"VersionEndIncluding":27},"E460AA51-FCDA-46B9-AE97-E6676AA5E194",[],[147],{"id":148,"eventType":149,"eventTime":150,"details":151,"label":152,"color":153},"5e3f846f-e89e-4ef4-8b57-7cb7bb2af9c2","HIGH_EPSS_DELTA","2026-06-16T04:05:42.962686+00:00","Daily EPSS score increased by 0.705 on 2023-12-30","EPSS Score Increased","red",{"lastModified":11,"cacheTime":155,"version":33},1792256430687,{"score":157,"band":41,"action":158,"scoredAt":159},59,"Plan remediation","2026-10-16T06:50:27.750574+00:00"]