[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fZFmMp02puOg_V0moXFiqkzOgfILXdr_Sv_IM6UAJ05s":3,"g5a-risk:CVE-2021-34436":112},{"success":4,"data":5,"meta":110},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":48,"weaknesses":55,"weaknessesCount":70,"isActivelyExploited":71,"cisaInfo":27,"otxData":27,"relatedBlogPosts":72,"seoMetadata":73,"configurations":98,"relatedVendorCves":108,"notableEvents":109},"CVE-2021-34436","What is CVE-2021-34436?","In Eclipse Theia 0.1.1 to 0.2.0, it is possible to exploit the default build to obtain remote code execution (and XXE) via the theia-xml-extension. This extension uses lsp4xml (recently renamed to LemMinX) in order to provide language support for XML. This is installed by default.","In Eclipse Theia 0.1.1 to 0.2.0, it is possible to exploit the default build to obtain remote code execution (and XXE) via the theia-xml-extension. This exte...","2021-09-02T21:15:07.977","2021-09-14T13:15:15.633",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",7.5,10,6.4,0.02223,[39,39,39,39,39,39,39],"Critical",[43],{"vendor":44,"product":45,"version":46,"criteria":47,"vulnerable":4},"eclipse","theia","*","cpe:2.3:a:eclipse:theia:*:*:*:*:*:*:*:*",1,[50],{"url":51,"source":52,"tags":53},"https:\u002F\u002Fbugs.eclipse.org\u002Fbugs\u002Fshow_bug.cgi?id=563174","Eclipse",[54],"Vendor Advisory",[56,64],{"id":57,"name":58,"description":59,"extendedDescription":60,"status":61,"abstraction":62,"structure":63},"CWE-22","Improper 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":65,"name":66,"description":67,"extendedDescription":68,"status":69,"abstraction":62,"structure":63},"CWE-611","Improper Restriction of XML External Entity Reference","The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output.","XML documents optionally contain a Document Type Definition (DTD), which, among other features, enables the definition of XML entities. It is possible to define an entity by providing a substitution string in the form of a URI. The XML parser can access the contents of this URI and embed these contents back into the XML document for further processing.\nBy submitting an XML file that defines an external entity with a file:\u002F\u002F URI, an attacker can cause the processing application to read the contents of a local file. For example, a URI such as \"file:\u002F\u002F\u002Fc:\u002Fwinnt\u002Fwin.ini\" designates (in Windows) the file C:\\Winnt\\win.ini, or file:\u002F\u002F\u002Fetc\u002Fpasswd designates the password file in Unix-based systems. Using URIs with other schemes such as http:\u002F\u002F, the attacker can force the application to make outgoing requests to servers that the attacker cannot reach directly, which can be used to bypass firewall restrictions or hide the source of attacks such as port scanning.\nOnce the content of the URI is read, it is fed back into the application that is processing the XML. This application may echo back the data (e.g. in an error message), thereby exposing the file contents.","Draft",2,false,[],{"title":74,"metaDescription":75,"keywords":76,"canonicalUrl":77,"structuredData":78},"What is CVE-2021-34436? Vulnerability Analysis | Security Advisory | Precursor Intelligence","Comprehensive analysis of CVE-2021-34436, a critical severity cyber security vulnerability from 2021. In Eclipse Theia 0.1.1 to 0.2.0, it is possible to expl...","CVE-2021-34436, CVE-2021-34436 vulnerability, CVE-2021-34436 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, eclipse security, theia vulnerability","\u002Fwhat-is\u002Fcve-2021-34436",{"@context":79,"@type":80,"headline":74,"description":75,"datePublished":10,"dateModified":11,"author":81,"publisher":85,"about":89,"mainEntityOfPage":93,"articleSection":96,"keywords":97},"https:\u002F\u002Fschema.org","TechArticle",{"@type":82,"name":83,"url":84},"Organization","Precursor Intelligence","https:\u002F\u002Fprecursorintelligence.com",{"@type":82,"name":83,"url":84,"logo":86},{"@type":87,"url":88},"ImageObject","https:\u002F\u002Fprecursorintelligence.com\u002Fimg\u002Flogos\u002Feplogo.png",{"@type":90,"name":6,"description":91,"additionalType":92},"Thing","Cybersecurity Vulnerability","https:\u002F\u002Fschema.org\u002FSoftwareBug",{"@type":94,"@id":95},"WebPage","https:\u002F\u002Fprecursorintelligence.com\u002Fwhat-is\u002Fcve-2021-34436","Cybersecurity","CVE-2021-34436, CVE-2021-34436 vulnerability, CVE-2021-34436 security, critical severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research",[99],{"Operator":27,"Negate":27,"Nodes":100},[101],{"Operator":102,"Negate":27,"CPEMatch":103},"OR",[104],{"Vulnerable":4,"Criteria":47,"MatchCriteriaID":105,"VersionStartExcluding":27,"VersionStartIncluding":106,"VersionEndExcluding":27,"VersionEndIncluding":107},"48EB037C-5A65-4DB8-8A8C-305D6A42B0EB","0.1.1","0.2.0",[],[],{"lastModified":11,"cacheTime":111,"version":33},1792275689483,{"score":113,"band":114,"action":115,"scoredAt":116},54,"Medium","Plan remediation","2026-10-16T06:51:58.600794+00:00"]