[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fF-CXMQox3EbL0xLRIdJ5HBLJ13g7akOyFv9f6KiHsdQ":3,"g5a-risk:CVE-2021-41247":119},{"success":4,"data":5,"meta":117},true,{"cveId":6,"title":7,"description":8,"shortDescription":9,"publishedDate":10,"lastModified":11,"cvssScore":12,"cvssVector":13,"cvssMetrics":14,"epssScore":48,"epssPercentile":26,"epssTimeSeries":49,"severity":50,"affectedProducts":51,"affectedProductsCount":57,"references":58,"referencesCount":68,"weaknesses":69,"weaknessesCount":57,"isActivelyExploited":78,"cisaInfo":26,"otxData":26,"relatedBlogPosts":79,"seoMetadata":80,"configurations":105,"relatedVendorCves":115,"notableEvents":116},"CVE-2021-41247","What is CVE-2021-41247?","JupyterHub is an open source multi-user server for Jupyter notebooks. In affected versions users who have multiple JupyterLab tabs open in the same browser session, may see incomplete logout from the single-user server, as fresh credentials (for the single-user server only, not the Hub) reinstated after logout, if another active JupyterLab session is open while the logout takes place. Upgrade to JupyterHub 1.5. For distributed deployments, it is jupyterhub in the _user_ environment that needs patching. There are no patches necessary in the Hub environment. The only workaround is to make sure that only one JupyterLab tab is open when you log out.","JupyterHub is an open source multi-user server for Jupyter notebooks. In affected versions users who have multiple JupyterLab tabs open in the same browser s...","2021-11-04T18:15:08.707","2021-11-10T17:12:52.147",7.5,"CVSS:3.1\u002FAV:N\u002FAC:L\u002FPR:N\u002FUI:N\u002FS:U\u002FC:N\u002FI:H\u002FA:N",{"CVSSMetricV31":15,"CVSSMetricV30":26,"CVSSMetricV2":38,"CVSSMetricV40":26},[16,29],{"Source":17,"Type":18,"CVSSData":19,"ExploitabilityScore":27,"ImpactScore":28},"nvd@nist.gov","Primary",{"Version":20,"VectorString":13,"AttackVector":21,"AttackComplexity":22,"PrivilegesRequired":23,"UserInteraction":23,"Scope":24,"ConfidentialityImpact":23,"IntegrityImpact":25,"AvailabilityImpact":23,"BaseScore":12,"BaseSeverity":25,"ExploitCodeMaturity":26,"RemediationLevel":26,"ReportConfidence":26,"TemporalScore":26,"TemporalSeverity":26,"ConfidentialityRequirement":26,"IntegrityRequirement":26,"AvailabilityRequirement":23,"ModifiedAttackVector":26,"ModifiedAttackComplexity":26,"ModifiedPrivilegesRequired":26,"ModifiedUserInteraction":26,"ModifiedScope":26,"ModifiedConfidentialityImpact":26,"ModifiedIntegrityImpact":26,"ModifiedAvailabilityImpact":26,"EnvironmentalScore":26,"EnvironmentalSeverity":26},"3.1","NETWORK","LOW","NONE","UNCHANGED","HIGH",null,3.9,3.6,{"Source":30,"Type":31,"CVSSData":32,"ExploitabilityScore":36,"ImpactScore":37},"security-advisories@github.com","Secondary",{"Version":20,"VectorString":33,"AttackVector":21,"AttackComplexity":22,"PrivilegesRequired":22,"UserInteraction":34,"Scope":24,"ConfidentialityImpact":22,"IntegrityImpact":23,"AvailabilityImpact":23,"BaseScore":35,"BaseSeverity":22,"ExploitCodeMaturity":26,"RemediationLevel":26,"ReportConfidence":26,"TemporalScore":26,"TemporalSeverity":26,"ConfidentialityRequirement":26,"IntegrityRequirement":26,"AvailabilityRequirement":23,"ModifiedAttackVector":26,"ModifiedAttackComplexity":26,"ModifiedPrivilegesRequired":26,"ModifiedUserInteraction":26,"ModifiedScope":26,"ModifiedConfidentialityImpact":26,"ModifiedIntegrityImpact":26,"ModifiedAvailabilityImpact":26,"EnvironmentalScore":26,"EnvironmentalSeverity":26},"CVSS:3.1\u002FAV:N\u002FAC:L\u002FPR:L\u002FUI:R\u002FS:U\u002FC:L\u002FI:N\u002FA:N","REQUIRED",3.5,2.1,1.4,[39],{"Source":17,"Type":18,"CVSSData":40,"BaseSeverity":45,"ExploitabilityScore":46,"ImpactScore":47,"ACInsufInfo":26,"ObtainAllPrivilege":26,"ObtainUserPrivilege":26,"ObtainOtherPrivilege":26,"UserInteractionRequired":26},{"Version":41,"VectorString":42,"AccessVector":21,"AccessComplexity":22,"Authentication":23,"ConfidentialityImpact":23,"IntegrityImpact":43,"AvailabilityImpact":23,"BaseScore":44,"BaseSeverity":26,"Exploitability":26,"RemediationLevel":26,"ReportConfidence":26,"TemporalScore":26,"CollateralDamagePotential":26,"TargetDistribution":26,"ConfidentialityRequirement":26,"IntegrityRequirement":26,"AvailabilityRequirement":26,"EnvironmentalScore":26},"2.0","AV:N\u002FAC:L\u002FAu:N\u002FC:N\u002FI:P\u002FA:N","PARTIAL",5,"MEDIUM",10,2.9,0.00804,[48,48,48,48,48,48,48],"High",[52],{"vendor":53,"product":54,"version":55,"criteria":56,"vulnerable":4},"jupyter","jupyterhub","*","cpe:2.3:a:jupyter:jupyterhub:*:*:*:*:*:*:*:*",1,[59,65],{"url":60,"source":61,"tags":62},"https:\u002F\u002Fgithub.com\u002Fjupyterhub\u002Fjupyterhub\u002Fcommit\u002F5ac9e7f73a6e1020ffddc40321fc53336829fe27","GitHub",[63,64],"Patch","Third Party Advisory",{"url":66,"source":61,"tags":67},"https:\u002F\u002Fgithub.com\u002Fjupyterhub\u002Fjupyterhub\u002Fsecurity\u002Fadvisories\u002FGHSA-cw7p-q79f-m2v7",[64],2,[70],{"id":71,"name":72,"description":73,"extendedDescription":74,"status":75,"abstraction":76,"structure":77},"CWE-613","Insufficient Session Expiration","According to WASC, \"Insufficient Session Expiration is when a web site permits an attacker to reuse old session credentials or session IDs for authorization.\"","","Incomplete","Base","Simple",false,[],{"title":81,"metaDescription":82,"keywords":83,"canonicalUrl":84,"structuredData":85},"What is CVE-2021-41247? Vulnerability Analysis | Security Advisory | Precursor Intelligence","Comprehensive analysis of CVE-2021-41247, a high severity cyber security vulnerability from 2021. JupyterHub is an open source multi-user server for Jupyter ...","CVE-2021-41247, CVE-2021-41247 vulnerability, CVE-2021-41247 security, high severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research, vulnerability assessment, cyber threats, 2021, CVSS score, exploit, patch, remediation, jupyter security, jupyterhub vulnerability","\u002Fwhat-is\u002Fcve-2021-41247",{"@context":86,"@type":87,"headline":81,"description":82,"datePublished":10,"dateModified":11,"author":88,"publisher":92,"about":96,"mainEntityOfPage":100,"articleSection":103,"keywords":104},"https:\u002F\u002Fschema.org","TechArticle",{"@type":89,"name":90,"url":91},"Organization","Precursor Intelligence","https:\u002F\u002Fprecursorintelligence.com",{"@type":89,"name":90,"url":91,"logo":93},{"@type":94,"url":95},"ImageObject","https:\u002F\u002Fprecursorintelligence.com\u002Fimg\u002Flogos\u002Feplogo.png",{"@type":97,"name":6,"description":98,"additionalType":99},"Thing","Cybersecurity Vulnerability","https:\u002F\u002Fschema.org\u002FSoftwareBug",{"@type":101,"@id":102},"WebPage","https:\u002F\u002Fprecursorintelligence.com\u002Fwhat-is\u002Fcve-2021-41247","Cybersecurity","CVE-2021-41247, CVE-2021-41247 vulnerability, CVE-2021-41247 security, high severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research",[106],{"Operator":26,"Negate":26,"Nodes":107},[108],{"Operator":109,"Negate":26,"CPEMatch":110},"OR",[111],{"Vulnerable":4,"Criteria":56,"MatchCriteriaID":112,"VersionStartExcluding":26,"VersionStartIncluding":113,"VersionEndExcluding":114,"VersionEndIncluding":26},"C44BE321-6186-4786-A3CB-458DDEE2FA1A","1.0.0","1.5.0",[],[],{"lastModified":11,"cacheTime":118,"version":41},1792276949265,{"score":120,"band":121,"action":122,"scoredAt":123},48,"Medium","Plan remediation","2026-10-16T06:52:22.985839+00:00"]