[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fLCI_vGBFBZQWEQuZFR8IGuhvn8353W2JCaD5ZuoZ4bU":3,"g5a-risk:CVE-2021-21337":130},{"success":4,"data":5,"meta":128},true,{"cveId":6,"title":7,"description":8,"shortDescription":9,"publishedDate":10,"lastModified":11,"cvssScore":12,"cvssVector":13,"cvssMetrics":14,"epssScore":49,"epssPercentile":27,"epssTimeSeries":50,"severity":51,"affectedProducts":52,"affectedProductsCount":58,"references":59,"referencesCount":80,"weaknesses":81,"weaknessesCount":58,"isActivelyExploited":90,"cisaInfo":27,"otxData":27,"relatedBlogPosts":91,"seoMetadata":92,"configurations":117,"relatedVendorCves":126,"notableEvents":127},"CVE-2021-21337","What is CVE-2021-21337?","Products.PluggableAuthService is a pluggable Zope authentication and authorization framework. In Products.PluggableAuthService before version 2.6.0 there is an open redirect vulnerability. A maliciously crafted link to the login form and login functionality could redirect the browser to a different website. The problem has been fixed in version 2.6.1. Depending on how you have installed Products.PluggableAuthService, you should change the buildout version pin to `2.6.1` and re-run the buildout, or if you used `pip` simply do `pip install \"Products.PluggableAuthService>=2.6.1\".","Products.PluggableAuthService is a pluggable Zope authentication and authorization framework. In Products.PluggableAuthService before version 2.6.0 there is ...","2021-03-08T21:15:16.807","2022-01-01T18:02:30.367",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":40,"CVSSMetricV40":27},[16,30],{"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,{"Source":31,"Type":32,"CVSSData":33,"ExploitabilityScore":38,"ImpactScore":39},"security-advisories@github.com","Secondary",{"Version":20,"VectorString":34,"AttackVector":21,"AttackComplexity":22,"PrivilegesRequired":22,"UserInteraction":24,"Scope":35,"ConfidentialityImpact":36,"IntegrityImpact":23,"AvailabilityImpact":23,"BaseScore":37,"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},"CVSS:3.1\u002FAV:N\u002FAC:L\u002FPR:L\u002FUI:R\u002FS:U\u002FC:H\u002FI:N\u002FA:N","UNCHANGED","HIGH",5.7,2.1,3.6,[41],{"Source":17,"Type":18,"CVSSData":42,"BaseSeverity":26,"ExploitabilityScore":47,"ImpactScore":48,"ACInsufInfo":27,"ObtainAllPrivilege":27,"ObtainUserPrivilege":27,"ObtainOtherPrivilege":27,"UserInteractionRequired":4},{"Version":43,"VectorString":44,"AccessVector":21,"AccessComplexity":26,"Authentication":23,"ConfidentialityImpact":45,"IntegrityImpact":45,"AvailabilityImpact":23,"BaseScore":46,"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",5.8,8.6,4.9,0.08443,[49,49,49,49,49,49,49],"Medium",[53],{"vendor":54,"product":55,"version":56,"criteria":57,"vulnerable":4},"zope","products.pluggableauthservice","*","cpe:2.3:a:zope:products.pluggableauthservice:*:*:*:*:*:*:*:*",1,[60,67,72,75],{"url":61,"source":62,"tags":63},"http:\u002F\u002Fpacketstormsecurity.com\u002Ffiles\u002F162911\u002FProducts.PluggableAuthService-2.6.0-Open-Redirect.html","Packetstormsecurity",[64,65,66],"Exploit","Third Party Advisory","VDB Entry",{"url":68,"source":69,"tags":70},"https:\u002F\u002Fgithub.com\u002Fzopefoundation\u002FProducts.PluggableAuthService\u002Fcommit\u002F7eead067898852ebd3e0f143bc51295928528dfa","GitHub",[71,65],"Patch",{"url":73,"source":69,"tags":74},"https:\u002F\u002Fgithub.com\u002Fzopefoundation\u002FProducts.PluggableAuthService\u002Fsecurity\u002Fadvisories\u002FGHSA-p44j-xrqg-4xrr",[65],{"url":76,"source":77,"tags":78},"https:\u002F\u002Fpypi.org\u002Fproject\u002FProducts.PluggableAuthService\u002F","Pypi",[79,65],"Product",4,[82],{"id":83,"name":84,"description":85,"extendedDescription":86,"status":87,"abstraction":88,"structure":89},"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",false,[],{"title":93,"metaDescription":94,"keywords":95,"canonicalUrl":96,"structuredData":97},"What is CVE-2021-21337? Vulnerability Analysis | Security Advisory | Precursor Intelligence","Comprehensive analysis of CVE-2021-21337, a medium severity cyber security vulnerability from 2021. Products.PluggableAuthService is a pluggable Zope authent...","CVE-2021-21337, CVE-2021-21337 vulnerability, CVE-2021-21337 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, zope security, products.pluggableauthservice vulnerability","\u002Fwhat-is\u002Fcve-2021-21337",{"@context":98,"@type":99,"headline":93,"description":94,"datePublished":10,"dateModified":11,"author":100,"publisher":104,"about":108,"mainEntityOfPage":112,"articleSection":115,"keywords":116},"https:\u002F\u002Fschema.org","TechArticle",{"@type":101,"name":102,"url":103},"Organization","Precursor Intelligence","https:\u002F\u002Fprecursorintelligence.com",{"@type":101,"name":102,"url":103,"logo":105},{"@type":106,"url":107},"ImageObject","https:\u002F\u002Fprecursorintelligence.com\u002Fimg\u002Flogos\u002Feplogo.png",{"@type":109,"name":6,"description":110,"additionalType":111},"Thing","Cybersecurity Vulnerability","https:\u002F\u002Fschema.org\u002FSoftwareBug",{"@type":113,"@id":114},"WebPage","https:\u002F\u002Fprecursorintelligence.com\u002Fwhat-is\u002Fcve-2021-21337","Cybersecurity","CVE-2021-21337, CVE-2021-21337 vulnerability, CVE-2021-21337 security, medium severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research",[118],{"Operator":27,"Negate":27,"Nodes":119},[120],{"Operator":121,"Negate":27,"CPEMatch":122},"OR",[123],{"Vulnerable":4,"Criteria":57,"MatchCriteriaID":124,"VersionStartExcluding":27,"VersionStartIncluding":27,"VersionEndExcluding":125,"VersionEndIncluding":27},"660F14A0-3EF8-4F9A-86F9-6A97D527E35A","2.6.1",[],[],{"lastModified":11,"cacheTime":129,"version":43},1792265786816,{"score":131,"band":51,"action":132,"scoredAt":133},45,"Plan remediation","2026-10-16T06:50:38.821013+00:00"]