[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fhkpRZ42W7SjLQbHFxCdt8y06KR_HYNhzE-8xH66Tvbg":3,"g5a-risk:CVE-2021-27905":141},{"success":4,"data":5,"meta":139},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":48,"references":49,"referencesCount":91,"weaknesses":92,"weaknessesCount":48,"isActivelyExploited":101,"cisaInfo":27,"otxData":27,"relatedBlogPosts":102,"seoMetadata":103,"configurations":128,"relatedVendorCves":137,"notableEvents":138},"CVE-2021-27905","What is CVE-2021-27905?","The ReplicationHandler (normally registered at \"\u002Freplication\" under a Solr core) in Apache Solr has a \"masterUrl\" (also \"leaderUrl\" alias) parameter that is used to designate another ReplicationHandler on another Solr core to replicate index data into the local core. To prevent a SSRF vulnerability, Solr ought to check these parameters against a similar configuration it uses for the \"shards\" parameter. Prior to this bug getting fixed, it did not. This problem affects essentially all Solr versions prior to it getting fixed in 8.8.2.","The ReplicationHandler (normally registered at \"\u002Freplication\" under a Solr core) in Apache Solr has a \"masterUrl\" (also \"leaderUrl\" alias) parameter that is ...","2021-04-13T07:15:12.137","2023-11-07T03:32:02.153",9.8,"CVSS:3.1\u002FAV:N\u002FAC:L\u002FPR:N\u002FUI:N\u002FS:U\u002FC:H\u002FI:H\u002FA:H",{"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":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":25,"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,[31],{"Source":17,"Type":18,"CVSSData":32,"BaseSeverity":25,"ExploitabilityScore":37,"ImpactScore":38,"ACInsufInfo":27,"ObtainAllPrivilege":27,"ObtainUserPrivilege":27,"ObtainOtherPrivilege":27,"UserInteractionRequired":27},{"Version":33,"VectorString":34,"AccessVector":21,"AccessComplexity":22,"Authentication":23,"ConfidentialityImpact":35,"IntegrityImpact":35,"AvailabilityImpact":35,"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:L\u002FAu:N\u002FC:P\u002FI:P\u002FA:P","PARTIAL",7.5,10,6.4,0.93053,[39,39,39,39,39,39,39],"Critical",[43],{"vendor":44,"product":45,"version":46,"criteria":47,"vulnerable":4},"apache","solr","*","cpe:2.3:a:apache:solr:*:*:*:*:*:*:*:*",1,[50,56,59,62,65,68,71,74,77,80,83,86],{"url":51,"source":52,"tags":53},"https:\u002F\u002Flists.apache.org\u002Fthread.html\u002Fr0ddc3a82bd7523b1453cb7a5e09eb5559517145425074a42eb326b10%40%3Cannounce.apache.org%3E","Apache",[54,55],"Mailing List","Vendor Advisory",{"url":57,"source":52,"tags":58},"https:\u002F\u002Flists.apache.org\u002Fthread.html\u002Fr140128dc6bb4f4e0b6a39e962c7ca25a8cbc8e48ed766176c931fccc%40%3Cusers.solr.apache.org%3E",[],{"url":60,"source":52,"tags":61},"https:\u002F\u002Flists.apache.org\u002Fthread.html\u002Fr3da74965aba2b5f5744b7289ad447306eeb2940c872801819faa9314%40%3Cusers.solr.apache.org%3E",[],{"url":63,"source":52,"tags":64},"https:\u002F\u002Flists.apache.org\u002Fthread.html\u002Fr6ccec7fc54d82591b23c143f1f6a6e38f6e03e75db70870e4cb14a1a%40%3Ccommits.ofbiz.apache.org%3E",[],{"url":66,"source":52,"tags":67},"https:\u002F\u002Flists.apache.org\u002Fthread.html\u002Fr720a4a0497fc90bad5feec8aa18b777912ee15c7eeb5f882adbf523e%40%3Ccommits.ofbiz.apache.org%3E",[],{"url":69,"source":52,"tags":70},"https:\u002F\u002Flists.apache.org\u002Fthread.html\u002Fr78a3a4f1138a1608b0c6d4a2ee7647848c1a20b0d5c652cd9b02c25a%40%3Ccommits.ofbiz.apache.org%3E",[],{"url":72,"source":52,"tags":73},"https:\u002F\u002Flists.apache.org\u002Fthread.html\u002Fr8f1152a43c36d878bbeb5a92f261e9efaf3af313b033d7acfccea59d%40%3Cnotifications.ofbiz.apache.org%3E",[],{"url":75,"source":52,"tags":76},"https:\u002F\u002Flists.apache.org\u002Fthread.html\u002Fr95df34bb158375948da82b4dfe9a1b5d528572d586584162f8f5aeef%40%3Cusers.solr.apache.org%3E",[],{"url":78,"source":52,"tags":79},"https:\u002F\u002Flists.apache.org\u002Fthread.html\u002Frae9ccaecce9859f709ed1458545d90a4c07163070dc98b5e9e59057f%40%3Cnotifications.ofbiz.apache.org%3E",[],{"url":81,"source":52,"tags":82},"https:\u002F\u002Flists.apache.org\u002Fthread.html\u002Frd232d77c57a8ce172359ab098df9512d8b37373ab87c444be911b430%40%3Cnotifications.ofbiz.apache.org%3E",[],{"url":84,"source":52,"tags":85},"https:\u002F\u002Flists.apache.org\u002Fthread.html\u002Fre9d64bb8e5dfefddcbf255adb4559e13a0df5b818da1b9b51329723f%40%3Cnotifications.ofbiz.apache.org%3E",[],{"url":87,"source":88,"tags":89},"https:\u002F\u002Fsecurity.netapp.com\u002Fadvisory\u002Fntap-20210611-0009\u002F","Netapp",[90],"Third Party Advisory",12,[93],{"id":94,"name":95,"description":96,"extendedDescription":97,"status":98,"abstraction":99,"structure":100},"CWE-918","Server-Side Request Forgery (SSRF)","The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.","By providing URLs to unexpected hosts or ports, attackers can make it appear that the server is sending the request, possibly bypassing access controls such as firewalls that prevent the attackers from accessing the URLs directly. The server can be used as a proxy to conduct port scanning of hosts in internal networks, use other URLs such as that can access documents on the system (using file:\u002F\u002F), or use other protocols such as gopher:\u002F\u002F or tftp:\u002F\u002F, which may provide greater control over the contents of requests.","Incomplete","Base","Simple",false,[],{"title":104,"metaDescription":105,"keywords":106,"canonicalUrl":107,"structuredData":108},"What is CVE-2021-27905? Vulnerability Analysis | Security Advisory | Precursor Intelligence","Comprehensive analysis of CVE-2021-27905, a critical severity cyber security vulnerability from 2021. High exploit probability (93.1%). The ReplicationHandle...","CVE-2021-27905, CVE-2021-27905 vulnerability, CVE-2021-27905 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, apache security, solr vulnerability, high risk vulnerability, actively exploited, exploit available","\u002Fwhat-is\u002Fcve-2021-27905",{"@context":109,"@type":110,"headline":104,"description":105,"datePublished":10,"dateModified":11,"author":111,"publisher":115,"about":119,"mainEntityOfPage":123,"articleSection":126,"keywords":127},"https:\u002F\u002Fschema.org","TechArticle",{"@type":112,"name":113,"url":114},"Organization","Precursor Intelligence","https:\u002F\u002Fprecursorintelligence.com",{"@type":112,"name":113,"url":114,"logo":116},{"@type":117,"url":118},"ImageObject","https:\u002F\u002Fprecursorintelligence.com\u002Fimg\u002Flogos\u002Feplogo.png",{"@type":120,"name":6,"description":121,"additionalType":122},"Thing","Cybersecurity Vulnerability","https:\u002F\u002Fschema.org\u002FSoftwareBug",{"@type":124,"@id":125},"WebPage","https:\u002F\u002Fprecursorintelligence.com\u002Fwhat-is\u002Fcve-2021-27905","Cybersecurity","CVE-2021-27905, CVE-2021-27905 vulnerability, CVE-2021-27905 security, critical severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research",[129],{"Operator":27,"Negate":27,"Nodes":130},[131],{"Operator":132,"Negate":27,"CPEMatch":133},"OR",[134],{"Vulnerable":4,"Criteria":47,"MatchCriteriaID":135,"VersionStartExcluding":27,"VersionStartIncluding":27,"VersionEndExcluding":136,"VersionEndIncluding":27},"B8DCA294-D45F-4B22-8183-301F60BC4393","8.8.2",[],[],{"lastModified":11,"cacheTime":140,"version":33},1792348112512,{"score":142,"band":143,"action":144,"scoredAt":145},72,"High","Patch now","2026-10-16T06:50:54.299202+00:00"]