[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fCQmSY6Ke59STRNMAWaKmNTgDdVUe3dD2XBo2GC6V750":3,"g5a-risk:CVE-2020-2021":139},{"success":4,"data":5,"meta":137},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":55,"references":56,"referencesCount":70,"weaknesses":71,"weaknessesCount":55,"isActivelyExploited":4,"cisaInfo":79,"otxData":27,"relatedBlogPosts":80,"seoMetadata":81,"configurations":106,"relatedVendorCves":128,"notableEvents":129},"CVE-2020-2021","What is CVE-2020-2021?","When Security Assertion Markup Language (SAML) authentication is enabled and the 'Validate Identity Provider Certificate' option is disabled (unchecked), improper verification of signatures in PAN-OS SAML authentication enables an unauthenticated network-based attacker to access protected resources. The attacker must have network access to the vulnerable server to exploit this vulnerability. This issue affects PAN-OS 9.1 versions earlier than PAN-OS 9.1.3; PAN-OS 9.0 versions earlier than PAN-OS 9.0.9; PAN-OS 8.1 versions earlier than PAN-OS 8.1.15, and all versions of PAN-OS 8.0 (EOL). This issue does not affect PAN-OS 7.1. This issue cannot be exploited if SAML is not used for authentication. This issue cannot be exploited if the 'Validate Identity Provider Certificate' option is enabled (checked) in the SAML Identity Provider Server Profile. Resources that can be protected by SAML-based single sign-on (SSO) authentication are: GlobalProtect Gateway, GlobalProtect Portal, GlobalProtect Clientless VPN, Authentication and Captive Portal, PAN-OS next-generation firewalls (PA-Series, VM-Series) and Panorama web interfaces, Prisma Access In the case of GlobalProtect Gateways, GlobalProtect Portal, Clientless VPN, Captive Portal, and Prisma Access, an unauthenticated attacker with network access to the affected servers can gain access to protected resources if allowed by configured authentication and Security policies. There is no impact on the integrity and availability of the gateway, portal or VPN server. An attacker cannot inspect or tamper with sessions of regular users. In the worst case, this is a critical severity vulnerability with a","When Security Assertion Markup Language (SAML) authentication is enabled and the 'Validate Identity Provider Certificate' option is disabled (unchecked), imp...","2020-06-29T15:15:12.733","2025-11-04T16:49:30.813",10,"CVSS:3.1\u002FAV:N\u002FAC:L\u002FPR:N\u002FUI:N\u002FS:C\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},"psirt@paloaltonetworks.com","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},"3.1","NETWORK","LOW","NONE","CHANGED","HIGH","CRITICAL",null,3.9,6,{"Source":31,"Type":32,"CVSSData":33,"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},[],[36],{"Source":31,"Type":32,"CVSSData":37,"BaseSeverity":25,"ExploitabilityScore":44,"ImpactScore":12,"ACInsufInfo":45,"ObtainAllPrivilege":45,"ObtainUserPrivilege":45,"ObtainOtherPrivilege":45,"UserInteractionRequired":45},{"Version":38,"VectorString":39,"AccessVector":21,"AccessComplexity":40,"Authentication":23,"ConfidentialityImpact":41,"IntegrityImpact":41,"AvailabilityImpact":41,"BaseScore":42,"BaseSeverity":43,"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:C\u002FI:C\u002FA:C","MEDIUM","COMPLETE",9.3,"",8.6,false,0.04362,[46,46,46,46,46,46,46],"Critical",[50],{"vendor":51,"product":52,"version":53,"criteria":54,"vulnerable":4},"paloaltonetworks","pan-os","*","cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*",1,[57,63,65],{"url":58,"source":59,"tags":60},"https:\u002F\u002Fsecurity.paloaltonetworks.com\u002FCVE-2020-2021","Paloaltonetworks",[61,62],"Mitigation","Vendor Advisory",{"url":58,"source":59,"tags":64},[61,62],{"url":66,"source":67,"tags":68},"https:\u002F\u002Fwww.cisa.gov\u002Fknown-exploited-vulnerabilities-catalog?field_cve=CVE-2020-2021","CISA",[69],"US Government Resource",3,[72],{"id":73,"name":74,"description":75,"extendedDescription":43,"status":76,"abstraction":77,"structure":78},"CWE-347","Improper Verification of Cryptographic Signature","The product does not verify, or incorrectly verifies, the cryptographic signature for data.","Draft","Base","Simple",{"shortDescription":43,"requiredAction":43,"vulnerabilityName":43,"dateAdded":27},[],{"title":82,"metaDescription":83,"keywords":84,"canonicalUrl":85,"structuredData":86},"What is CVE-2020-2021? Vulnerability Analysis | Security Advisory | Precursor Intelligence","Comprehensive analysis of CVE-2020-2021, a critical severity cyber security vulnerability from 2020. When Security Assertion Markup Language (SAML) authentic...","CVE-2020-2021, CVE-2020-2021 vulnerability, CVE-2020-2021 security, critical severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research, vulnerability assessment, cyber threats, 2020, CVSS score, exploit, patch, remediation, paloaltonetworks security, pan-os vulnerability","\u002Fwhat-is\u002Fcve-2020-2021",{"@context":87,"@type":88,"headline":82,"description":83,"datePublished":10,"dateModified":11,"author":89,"publisher":93,"about":97,"mainEntityOfPage":101,"articleSection":104,"keywords":105},"https:\u002F\u002Fschema.org","TechArticle",{"@type":90,"name":91,"url":92},"Organization","Precursor Intelligence","https:\u002F\u002Fprecursorintelligence.com",{"@type":90,"name":91,"url":92,"logo":94},{"@type":95,"url":96},"ImageObject","https:\u002F\u002Fprecursorintelligence.com\u002Fimg\u002Flogos\u002Feplogo.png",{"@type":98,"name":6,"description":99,"additionalType":100},"Thing","Cybersecurity Vulnerability","https:\u002F\u002Fschema.org\u002FSoftwareBug",{"@type":102,"@id":103},"WebPage","https:\u002F\u002Fprecursorintelligence.com\u002Fwhat-is\u002Fcve-2020-2021","Cybersecurity","CVE-2020-2021, CVE-2020-2021 vulnerability, CVE-2020-2021 security, critical severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research",[107],{"Operator":27,"Negate":27,"Nodes":108},[109],{"Operator":110,"Negate":45,"CPEMatch":111},"OR",[112,116,120,124],{"Vulnerable":4,"Criteria":54,"MatchCriteriaID":113,"VersionStartExcluding":27,"VersionStartIncluding":114,"VersionEndExcluding":27,"VersionEndIncluding":115},"2BEFBF38-AF84-4477-A6B9-5BDD51D54F4F","8.0.0","8.0.20",{"Vulnerable":4,"Criteria":54,"MatchCriteriaID":117,"VersionStartExcluding":27,"VersionStartIncluding":118,"VersionEndExcluding":119,"VersionEndIncluding":27},"6116C706-6AC7-476D-9624-C0D4BE3D497A","8.1.0","8.1.15",{"Vulnerable":4,"Criteria":54,"MatchCriteriaID":121,"VersionStartExcluding":27,"VersionStartIncluding":122,"VersionEndExcluding":123,"VersionEndIncluding":27},"6D6E8B99-4150-4AE8-A580-08AC71F64760","9.0.0","9.0.9",{"Vulnerable":4,"Criteria":54,"MatchCriteriaID":125,"VersionStartExcluding":27,"VersionStartIncluding":126,"VersionEndExcluding":127,"VersionEndIncluding":27},"4E9F14E9-3CD7-443B-9D97-254E917FA22B","9.1.0","9.1.3",[],[130],{"id":131,"eventType":132,"eventTime":133,"details":134,"label":135,"color":136},"fcb92816-c773-4931-93a7-e9f319d5c899","LOW_EPSS_DELTA","2026-06-16T04:05:53.631785+00:00","Daily EPSS score decreased by 0.150 on 2023-12-30","EPSS Score Decreased","green",{"lastModified":11,"cacheTime":138,"version":38},1792237520701,{"score":140,"band":48,"action":141,"scoredAt":142},88,"Emergency patch","2026-10-16T06:48:55.588677+00:00"]