[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f3J-Ep5ed3-altZOFxw7kDlwW4SPrq5WLbnGlYfP9KiM":3,"g5a-risk:CVE-2025-34491":118},{"success":4,"data":5,"meta":115},true,{"cveId":6,"title":7,"description":8,"shortDescription":9,"publishedDate":10,"lastModified":11,"cvssScore":12,"cvssVector":13,"cvssMetrics":14,"epssScore":35,"epssPercentile":26,"epssTimeSeries":36,"severity":37,"affectedProducts":38,"affectedProductsCount":44,"references":45,"referencesCount":60,"weaknesses":61,"weaknessesCount":44,"isActivelyExploited":70,"cisaInfo":26,"otxData":26,"relatedBlogPosts":71,"seoMetadata":72,"configurations":97,"relatedVendorCves":106,"notableEvents":107},"CVE-2025-34491","What is CVE-2025-34491?","GFI MailEssentials prior to version 21.8 is vulnerable to a .NET deserialization issue. A remote and authenticated attacker can execute arbitrary code by sending crafted serialized .NET when joining to a Multi-Server setup.","GFI MailEssentials prior to version 21.8 is vulnerable to a .NET deserialization issue. A remote and authenticated attacker can execute arbitrary code by sen...","2025-04-28T20:15:20.997","2025-11-04T23:15:37.043",8.8,"CVSS:3.1\u002FAV:N\u002FAC:L\u002FPR:L\u002FUI:N\u002FS:U\u002FC:H\u002FI:H\u002FA:H",{"CVSSMetricV31":15,"CVSSMetricV30":33,"CVSSMetricV2":34,"CVSSMetricV40":26},[16,29],{"Source":17,"Type":18,"CVSSData":19,"ExploitabilityScore":27,"ImpactScore":28},"disclosure@vulncheck.com","Secondary",{"Version":20,"VectorString":13,"AttackVector":21,"AttackComplexity":22,"PrivilegesRequired":22,"UserInteraction":23,"Scope":24,"ConfidentialityImpact":25,"IntegrityImpact":25,"AvailabilityImpact":25,"BaseScore":12,"BaseSeverity":25,"ExploitCodeMaturity":26,"RemediationLevel":26,"ReportConfidence":26,"TemporalScore":26,"TemporalSeverity":26,"ConfidentialityRequirement":26,"IntegrityRequirement":26,"AvailabilityRequirement":26,"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,2.8,5.9,{"Source":30,"Type":31,"CVSSData":32,"ExploitabilityScore":27,"ImpactScore":28},"nvd@nist.gov","Primary",{"Version":20,"VectorString":13,"AttackVector":21,"AttackComplexity":22,"PrivilegesRequired":22,"UserInteraction":23,"Scope":24,"ConfidentialityImpact":25,"IntegrityImpact":25,"AvailabilityImpact":25,"BaseScore":12,"BaseSeverity":25,"ExploitCodeMaturity":26,"RemediationLevel":26,"ReportConfidence":26,"TemporalScore":26,"TemporalSeverity":26,"ConfidentialityRequirement":26,"IntegrityRequirement":26,"AvailabilityRequirement":26,"ModifiedAttackVector":26,"ModifiedAttackComplexity":26,"ModifiedPrivilegesRequired":26,"ModifiedUserInteraction":26,"ModifiedScope":26,"ModifiedConfidentialityImpact":26,"ModifiedIntegrityImpact":26,"ModifiedAvailabilityImpact":26,"EnvironmentalScore":26,"EnvironmentalSeverity":26},[],[],0.00947,[35,35,35,35,35,35,35],"High",[39],{"vendor":40,"product":41,"version":42,"criteria":43,"vulnerable":4},"gfi","mailessentials","*","cpe:2.3:a:gfi:mailessentials:*:*:*:*:*:*:*:*",1,[46,51,56],{"url":47,"source":48,"tags":49},"https:\u002F\u002Ffrycos.github.io\u002Fvulns4free\u002F2025\u002F04\u002F28\u002Fmailessentials.html","Github",[50],"Exploit",{"url":52,"source":53,"tags":54},"https:\u002F\u002Fgfi.ai\u002Fproducts-and-solutions\u002Fnetwork-security-solutions\u002Fmailessentials\u002Fresources\u002Fdocumentation\u002Fproduct-releases","Gfi",[55],"Release Notes",{"url":57,"source":58,"tags":59},"https:\u002F\u002Fwww.vulncheck.com\u002Fadvisories\u002Fgfi-mailessentials-multinode-insecure-deserialization","Vulncheck",[],3,[62],{"id":63,"name":64,"description":65,"extendedDescription":66,"status":67,"abstraction":68,"structure":69},"CWE-502","Deserialization of Untrusted Data","The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid.","It is often convenient to serialize objects for communication or to save them for later use. However, deserialized data or code can often be modified without using the provided accessor functions if it does not use cryptography to protect itself. Furthermore, any cryptography would still be client-side security -- which is a dangerous security assumption.\nData that is untrusted can not be trusted to be well-formed.\nWhen developers place no restrictions on \"gadget chains,\" or series of instances and method invocations that can self-execute during the deserialization process (i.e., before the object is returned to the caller), it is sometimes possible for attackers to leverage them to perform unauthorized actions, like generating a shell.","Draft","Base","Simple",false,[],{"title":73,"metaDescription":74,"keywords":75,"canonicalUrl":76,"structuredData":77},"What is CVE-2025-34491? Vulnerability Analysis | Security Advisory | Precursor Intelligence","Comprehensive analysis of CVE-2025-34491, a high severity cyber security vulnerability from 2025. GFI MailEssentials prior to version 21.8 is vulnerable to a...","CVE-2025-34491, CVE-2025-34491 vulnerability, CVE-2025-34491 security, high severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research, vulnerability assessment, cyber threats, 2025, CVSS score, exploit, patch, remediation, gfi security, mailessentials vulnerability","\u002Fwhat-is\u002Fcve-2025-34491",{"@context":78,"@type":79,"headline":73,"description":74,"datePublished":10,"dateModified":11,"author":80,"publisher":84,"about":88,"mainEntityOfPage":92,"articleSection":95,"keywords":96},"https:\u002F\u002Fschema.org","TechArticle",{"@type":81,"name":82,"url":83},"Organization","Precursor Intelligence","https:\u002F\u002Fprecursorintelligence.com",{"@type":81,"name":82,"url":83,"logo":85},{"@type":86,"url":87},"ImageObject","https:\u002F\u002Fprecursorintelligence.com\u002Fimg\u002Flogos\u002Feplogo.png",{"@type":89,"name":6,"description":90,"additionalType":91},"Thing","Cybersecurity Vulnerability","https:\u002F\u002Fschema.org\u002FSoftwareBug",{"@type":93,"@id":94},"WebPage","https:\u002F\u002Fprecursorintelligence.com\u002Fwhat-is\u002Fcve-2025-34491","Cybersecurity","CVE-2025-34491, CVE-2025-34491 vulnerability, CVE-2025-34491 security, high severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research",[98],{"Operator":26,"Negate":26,"Nodes":99},[100],{"Operator":101,"Negate":70,"CPEMatch":102},"OR",[103],{"Vulnerable":4,"Criteria":43,"MatchCriteriaID":104,"VersionStartExcluding":26,"VersionStartIncluding":26,"VersionEndExcluding":105,"VersionEndIncluding":26},"BF05D573-6502-4902-95CC-59E8F15A38FC","21.8",[],[108],{"id":109,"eventType":110,"eventTime":111,"details":112,"label":113,"color":114},"24b9a474-7ef6-4760-96a0-79f0d28b5bdd","NEW_NVD","2025-04-29T02:15:19.418994+00:00","New CVE added to NVD","Published to NVD","blue",{"lastModified":11,"cacheTime":116,"version":117},1792364935182,"2.0",{"score":119,"band":120,"action":121,"scoredAt":122},58,"Medium","Plan remediation","2026-10-16T07:07:02.655684+00:00"]