[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fdKAgTsOhbYXpErqPA1tYni6F7R62THeFO_6MvNHSzTQ":3,"g5a-risk:CVE-2021-26084":154},{"success":4,"data":5,"meta":152},true,{"cveId":6,"title":7,"description":8,"shortDescription":9,"publishedDate":10,"lastModified":11,"cvssScore":12,"cvssVector":13,"cvssMetrics":14,"epssScore":46,"epssPercentile":27,"epssTimeSeries":47,"severity":48,"affectedProducts":49,"affectedProductsCount":58,"references":59,"referencesCount":83,"weaknesses":84,"weaknessesCount":93,"isActivelyExploited":4,"cisaInfo":94,"otxData":27,"relatedBlogPosts":95,"seoMetadata":96,"configurations":121,"relatedVendorCves":150,"notableEvents":151},"CVE-2021-26084","What is CVE-2021-26084?","In affected versions of Confluence Server and Data Center, an OGNL injection vulnerability exists that would allow an unauthenticated attacker to execute arbitrary code on a Confluence Server or Data Center instance. The affected versions are before version 6.13.23, from version 6.14.0 before 7.4.11, from version 7.5.0 before 7.11.6, and from version 7.12.0 before 7.12.5.","In affected versions of Confluence Server and Data Center, an OGNL injection vulnerability exists that would allow an unauthenticated attacker to execute arb...","2021-08-30T07:15:06.587","2025-10-24T13:38:44.59",9.8,"CVSS:3.1\u002FAV:N\u002FAC:L\u002FPR:N\u002FUI:N\u002FS:U\u002FC:H\u002FI:H\u002FA:H",{"CVSSMetricV31":15,"CVSSMetricV30":34,"CVSSMetricV2":35,"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":23,"Scope":24,"ConfidentialityImpact":25,"IntegrityImpact":25,"AvailabilityImpact":25,"BaseScore":12,"BaseSeverity":26,"ExploitCodeMaturity":27,"RemediationLevel":27,"ReportConfidence":27,"TemporalScore":27,"TemporalSeverity":27,"ConfidentialityRequirement":27,"IntegrityRequirement":27,"AvailabilityRequirement":27,"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","UNCHANGED","HIGH","CRITICAL",null,3.9,5.9,{"Source":31,"Type":32,"CVSSData":33,"ExploitabilityScore":28,"ImpactScore":29},"134c704f-9b21-4f2e-91b3-4a467353bcc0","Secondary",{"Version":20,"VectorString":13,"AttackVector":21,"AttackComplexity":22,"PrivilegesRequired":23,"UserInteraction":23,"Scope":24,"ConfidentialityImpact":25,"IntegrityImpact":25,"AvailabilityImpact":25,"BaseScore":12,"BaseSeverity":26,"ExploitCodeMaturity":27,"RemediationLevel":27,"ReportConfidence":27,"TemporalScore":27,"TemporalSeverity":27,"ConfidentialityRequirement":27,"IntegrityRequirement":27,"AvailabilityRequirement":27,"ModifiedAttackVector":27,"ModifiedAttackComplexity":27,"ModifiedPrivilegesRequired":27,"ModifiedUserInteraction":27,"ModifiedScope":27,"ModifiedConfidentialityImpact":27,"ModifiedIntegrityImpact":27,"ModifiedAvailabilityImpact":27,"EnvironmentalScore":27,"EnvironmentalSeverity":27},[],[36],{"Source":17,"Type":18,"CVSSData":37,"BaseSeverity":25,"ExploitabilityScore":43,"ImpactScore":44,"ACInsufInfo":45,"ObtainAllPrivilege":45,"ObtainUserPrivilege":45,"ObtainOtherPrivilege":45,"UserInteractionRequired":45},{"Version":38,"VectorString":39,"AccessVector":21,"AccessComplexity":22,"Authentication":23,"ConfidentialityImpact":40,"IntegrityImpact":40,"AvailabilityImpact":40,"BaseScore":41,"BaseSeverity":42,"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:L\u002FAu:N\u002FC:P\u002FI:P\u002FA:P","PARTIAL",7.5,"",10,6.4,false,0.99999,[46,46,46,46,46,46,46],"Critical",[50,55],{"vendor":51,"product":52,"version":53,"criteria":54,"vulnerable":4},"atlassian","confluence_data_center","*","cpe:2.3:a:atlassian:confluence_data_center:*:*:*:*:*:*:*:*",{"vendor":51,"product":56,"version":53,"criteria":57,"vulnerable":4},"confluence_server","cpe:2.3:a:atlassian:confluence_server:*:*:*:*:*:*:*:*",2,[60,67,74,76,78],{"url":61,"source":62,"tags":63},"http:\u002F\u002Fpacketstormsecurity.com\u002Ffiles\u002F167449\u002FAtlassian-Confluence-Namespace-OGNL-Injection.html","Packetstormsecurity",[64,65,66],"Exploit","Third Party Advisory","VDB Entry",{"url":68,"source":69,"tags":70},"https:\u002F\u002Fjira.atlassian.com\u002Fbrowse\u002FCONFSERVER-67940","Atlassian",[71,72,73],"Issue Tracking","Patch","Vendor Advisory",{"url":61,"source":62,"tags":75},[64,65,66],{"url":68,"source":69,"tags":77},[71,72,73],{"url":79,"source":80,"tags":81},"https:\u002F\u002Fwww.cisa.gov\u002Fknown-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26084","CISA",[82],"US Government Resource",5,[85],{"id":86,"name":87,"description":88,"extendedDescription":89,"status":90,"abstraction":91,"structure":92},"CWE-917","Improper Neutralization of Special Elements used in an Expression Language Statement ('Expression Language Injection')","The product constructs all or part of an expression language (EL) statement in a framework such as a Java Server Page (JSP) using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended EL statement before it is executed.","Frameworks such as Java Server Page (JSP) allow a developer to insert executable expressions within otherwise-static content. When the developer is not aware of the executable nature of these expressions and\u002For does not disable them, then if an attacker can inject expressions, this could lead to code execution or other unexpected behaviors.","Incomplete","Base","Simple",1,{"shortDescription":42,"requiredAction":42,"vulnerabilityName":42,"dateAdded":27},[],{"title":97,"metaDescription":98,"keywords":99,"canonicalUrl":100,"structuredData":101},"What is CVE-2021-26084? Vulnerability Analysis | Security Advisory | Precursor Intelligence","Comprehensive analysis of CVE-2021-26084, a critical severity cyber security vulnerability from 2021. High exploit probability (100.0%). In affected versions...","CVE-2021-26084, CVE-2021-26084 vulnerability, CVE-2021-26084 security, critical severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research, vulnerability assessment, cyber threats, 2021, CVSS score, exploit, patch, remediation, atlassian security, confluence_data_center vulnerability, confluence_server vulnerability, high risk vulnerability, actively exploited, exploit available","\u002Fwhat-is\u002Fcve-2021-26084",{"@context":102,"@type":103,"headline":97,"description":98,"datePublished":10,"dateModified":11,"author":104,"publisher":108,"about":112,"mainEntityOfPage":116,"articleSection":119,"keywords":120},"https:\u002F\u002Fschema.org","TechArticle",{"@type":105,"name":106,"url":107},"Organization","Precursor Intelligence","https:\u002F\u002Fprecursorintelligence.com",{"@type":105,"name":106,"url":107,"logo":109},{"@type":110,"url":111},"ImageObject","https:\u002F\u002Fprecursorintelligence.com\u002Fimg\u002Flogos\u002Feplogo.png",{"@type":113,"name":6,"description":114,"additionalType":115},"Thing","Cybersecurity Vulnerability","https:\u002F\u002Fschema.org\u002FSoftwareBug",{"@type":117,"@id":118},"WebPage","https:\u002F\u002Fprecursorintelligence.com\u002Fwhat-is\u002Fcve-2021-26084","Cybersecurity","CVE-2021-26084, CVE-2021-26084 vulnerability, CVE-2021-26084 security, critical severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research",[122],{"Operator":27,"Negate":27,"Nodes":123},[124],{"Operator":125,"Negate":45,"CPEMatch":126},"OR",[127,130,134,138,142,144,146,148],{"Vulnerable":4,"Criteria":54,"MatchCriteriaID":128,"VersionStartExcluding":27,"VersionStartIncluding":27,"VersionEndExcluding":129,"VersionEndIncluding":27},"6A28735F-4827-4410-8B0B-C209ECD21DFC","6.13.23",{"Vulnerable":4,"Criteria":54,"MatchCriteriaID":131,"VersionStartExcluding":27,"VersionStartIncluding":132,"VersionEndExcluding":133,"VersionEndIncluding":27},"FA5224DF-97AB-4D8E-B66D-FC65A1333531","6.14.0","7.4.11",{"Vulnerable":4,"Criteria":54,"MatchCriteriaID":135,"VersionStartExcluding":27,"VersionStartIncluding":136,"VersionEndExcluding":137,"VersionEndIncluding":27},"E776BF66-74F1-4D8E-9099-42A4E5EEE300","7.5.0","7.11.6",{"Vulnerable":4,"Criteria":54,"MatchCriteriaID":139,"VersionStartExcluding":27,"VersionStartIncluding":140,"VersionEndExcluding":141,"VersionEndIncluding":27},"E11303D6-258F-4FAC-A868-BF506E7F5A4E","7.12.0","7.12.5",{"Vulnerable":4,"Criteria":57,"MatchCriteriaID":143,"VersionStartExcluding":27,"VersionStartIncluding":27,"VersionEndExcluding":129,"VersionEndIncluding":27},"6D1FF67F-3FB4-4C0C-8263-3D4CA00A02CD",{"Vulnerable":4,"Criteria":57,"MatchCriteriaID":145,"VersionStartExcluding":27,"VersionStartIncluding":132,"VersionEndExcluding":133,"VersionEndIncluding":27},"F5CCD4D0-6BC7-442A-9D4D-43841FE40F3E",{"Vulnerable":4,"Criteria":57,"MatchCriteriaID":147,"VersionStartExcluding":27,"VersionStartIncluding":136,"VersionEndExcluding":137,"VersionEndIncluding":27},"DF59072C-9911-4035-A75A-27D882988919",{"Vulnerable":4,"Criteria":57,"MatchCriteriaID":149,"VersionStartExcluding":27,"VersionStartIncluding":140,"VersionEndExcluding":141,"VersionEndIncluding":27},"BFEE2534-EBEF-438B-B616-ED4FFBC9246E",[],[],{"lastModified":11,"cacheTime":153,"version":38},1792377182544,{"score":155,"band":48,"action":156,"scoredAt":157},90,"Emergency patch","2026-10-16T06:51:55.070799+00:00"]