[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fSK3sMJckCuJsgPsCZ1q-v9VwDb7pW-u6QiM1cg4Ox10":3,"g5a-risk:CVE-2020-17518":192},{"success":4,"data":5,"meta":190},true,{"cveId":6,"title":7,"description":8,"shortDescription":9,"publishedDate":10,"lastModified":11,"cvssScore":12,"cvssVector":13,"cvssMetrics":14,"epssScore":39,"epssPercentile":26,"epssTimeSeries":40,"severity":41,"affectedProducts":42,"affectedProductsCount":48,"references":49,"referencesCount":127,"weaknesses":128,"weaknessesCount":143,"isActivelyExploited":144,"cisaInfo":26,"otxData":26,"relatedBlogPosts":145,"seoMetadata":146,"configurations":171,"relatedVendorCves":181,"notableEvents":182},"CVE-2020-17518","What is CVE-2020-17518?","Apache Flink 1.5.1 introduced a REST handler that allows you to write an uploaded file to an arbitrary location on the local file system, through a maliciously modified HTTP HEADER. The files can be written to any location accessible by Flink 1.5.1. All users should upgrade to Flink 1.11.3 or 1.12.0 if their Flink instance(s) are exposed. The issue was fixed in commit a5264a6f41524afe8ceadf1d8ddc8c80f323ebc4 from apache\u002Fflink:master.","Apache Flink 1.5.1 introduced a REST handler that allows you to write an uploaded file to an arbitrary location on the local file system, through a malicious...","2021-01-05T12:15:12.367","2023-11-07T03:19:12.54",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":29,"CVSSMetricV40":26},[16],{"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,[30],{"Source":17,"Type":18,"CVSSData":31,"BaseSeverity":36,"ExploitabilityScore":37,"ImpactScore":38,"ACInsufInfo":26,"ObtainAllPrivilege":26,"ObtainUserPrivilege":26,"ObtainOtherPrivilege":26,"UserInteractionRequired":26},{"Version":32,"VectorString":33,"AccessVector":21,"AccessComplexity":22,"Authentication":23,"ConfidentialityImpact":23,"IntegrityImpact":34,"AvailabilityImpact":23,"BaseScore":35,"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",10,2.9,0.49104,[39,39,39,39,39,39,39],"High",[43],{"vendor":44,"product":45,"version":46,"criteria":47,"vulnerable":4},"apache","flink","*","cpe:2.3:a:apache:flink:*:*:*:*:*:*:*:*",1,[50,56,60,63,66,69,72,75,78,81,84,87,90,93,96,99,102,106,109,112,115,118,121,124],{"url":51,"source":52,"tags":53},"http:\u002F\u002Fwww.openwall.com\u002Flists\u002Foss-security\u002F2021\u002F01\u002F05\u002F1","Openwall",[54,55],"Mailing 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Limitation of a Pathname to a Restricted Directory ('Path Traversal')","The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.","Many file operations are intended to take place within a restricted directory. By using special elements such as \"..\" and \"\u002F\" separators, attackers can escape outside of the restricted location to access files or directories that are elsewhere on the system. One of the most common special elements is the \"..\u002F\" sequence, which in most modern operating systems is interpreted as the parent directory of the current location. This is referred to as relative path traversal. Path traversal also covers the use of absolute pathnames such as \"\u002Fusr\u002Flocal\u002Fbin\" to access unexpected files. This is referred to as absolute path traversal.","Stable","Base","Simple",{"id":138,"name":139,"description":140,"extendedDescription":141,"status":142,"abstraction":135,"structure":136},"CWE-23","Relative Path Traversal","The product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize sequences such as \"..\" that can resolve to a location that is outside of that directory.","This allows attackers to traverse the file system to access files or directories that are outside of the restricted directory.","Draft",2,false,[],{"title":147,"metaDescription":148,"keywords":149,"canonicalUrl":150,"structuredData":151},"What is CVE-2020-17518? Vulnerability Analysis | Security Advisory | EdgeProtect","Comprehensive analysis of CVE-2020-17518, a high severity cyber security vulnerability from 2021. High exploit probability (49.1%). Apache Flink 1.5.1 introd...","CVE-2020-17518, CVE-2020-17518 vulnerability, CVE-2020-17518 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, apache security, flink vulnerability, high risk vulnerability, actively exploited, exploit available","\u002Fwhat-is\u002Fcve-2020-17518",{"@context":152,"@type":153,"headline":147,"description":148,"datePublished":10,"dateModified":11,"author":154,"publisher":158,"about":162,"mainEntityOfPage":166,"articleSection":169,"keywords":170},"https:\u002F\u002Fschema.org","TechArticle",{"@type":155,"name":156,"url":157},"Organization","EdgeProtect","https:\u002F\u002Fedgeprotect.io",{"@type":155,"name":156,"url":157,"logo":159},{"@type":160,"url":161},"ImageObject","https:\u002F\u002Fedgeprotect.io\u002Fimg\u002Flogos\u002Fedgeprotect-logo-512.png",{"@type":163,"name":6,"description":164,"additionalType":165},"Thing","Cybersecurity Vulnerability","https:\u002F\u002Fschema.org\u002FSoftwareBug",{"@type":167,"@id":168},"WebPage","https:\u002F\u002Fedgeprotect.io\u002Fwhat-is\u002Fcve-2020-17518","Cybersecurity","CVE-2020-17518, CVE-2020-17518 vulnerability, CVE-2020-17518 security, high severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research",[172],{"Operator":26,"Negate":26,"Nodes":173},[174],{"Operator":175,"Negate":26,"CPEMatch":176},"OR",[177],{"Vulnerable":4,"Criteria":47,"MatchCriteriaID":178,"VersionStartExcluding":26,"VersionStartIncluding":179,"VersionEndExcluding":180,"VersionEndIncluding":26},"080CC731-EB0E-4F46-A9A0-D0AB49C84A83","1.5.1","1.11.3",[],[183],{"id":184,"eventType":185,"eventTime":186,"details":187,"label":188,"color":189},"c9fc29c4-f91c-4836-ab8d-4daebc971088","LOW_EPSS_DELTA","2026-06-16T04:05:54.136773+00:00","Daily EPSS score decreased by 0.415 on 2023-12-30","EPSS Score Decreased","green",{"lastModified":11,"cacheTime":191,"version":32},1793219414504,{"score":193,"band":41,"action":194,"scoredAt":195},81,"Emergency patch","2026-10-28T06:50:00.15692+00:00"]