[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f3WGTWNt__iN1EAV0o2qLNHcJKyBIbHsHcih_IQ66mVg":3,"g5a-risk:CVE-2021-35478":130},{"success":4,"data":5,"meta":128},true,{"cveId":6,"title":7,"description":8,"shortDescription":9,"publishedDate":10,"lastModified":11,"cvssScore":12,"cvssVector":13,"cvssMetrics":14,"epssScore":40,"epssPercentile":27,"epssTimeSeries":41,"severity":42,"affectedProducts":43,"affectedProductsCount":49,"references":50,"referencesCount":66,"weaknesses":67,"weaknessesCount":49,"isActivelyExploited":76,"cisaInfo":27,"otxData":27,"relatedBlogPosts":77,"seoMetadata":78,"configurations":103,"relatedVendorCves":112,"notableEvents":113},"CVE-2021-35478","What is CVE-2021-35478?","Nagios Log Server before 2.1.9 contains Reflected XSS in the dropdown box for the alert history and audit log function. All parameters used for filtering are affected. This affects users who open a crafted link or third-party web page.","Nagios Log Server before 2.1.9 contains Reflected XSS in the dropdown box for the alert history and audit log function. All parameters used for filtering are...","2021-07-30T14:15:17.917","2022-02-10T17:05:37.65",5.4,"CVSS:3.1\u002FAV:N\u002FAC:L\u002FPR:L\u002FUI:R\u002FS:C\u002FC:L\u002FI:L\u002FA:N",{"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":22,"UserInteraction":23,"Scope":24,"ConfidentialityImpact":22,"IntegrityImpact":22,"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","REQUIRED","CHANGED","NONE","MEDIUM",null,2.3,2.7,[31],{"Source":17,"Type":18,"CVSSData":32,"BaseSeverity":22,"ExploitabilityScore":38,"ImpactScore":39,"ACInsufInfo":27,"ObtainAllPrivilege":27,"ObtainUserPrivilege":27,"ObtainOtherPrivilege":27,"UserInteractionRequired":4},{"Version":33,"VectorString":34,"AccessVector":21,"AccessComplexity":26,"Authentication":35,"ConfidentialityImpact":25,"IntegrityImpact":36,"AvailabilityImpact":25,"BaseScore":37,"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:M\u002FAu:S\u002FC:N\u002FI:P\u002FA:N","SINGLE","PARTIAL",3.5,6.8,2.9,0.76624,[40,40,40,40,40,40,40],"Medium",[44],{"vendor":45,"product":46,"version":47,"criteria":48,"vulnerable":4},"nagios","log_server","*","cpe:2.3:a:nagios:log_server:*:*:*:*:*:*:*:*",1,[51,57,60],{"url":52,"source":53,"tags":54},"https:\u002F\u002Fresearch.nccgroup.com\u002F2021\u002F07\u002F22\u002Ftechnical-advisory-stored-and-reflected-xss-vulnerability-in-nagios-log-server-cve-2021-35478cve-2021-35479\u002F","Nccgroup",[55,56],"Exploit","Third Party Advisory",{"url":58,"source":53,"tags":59},"https:\u002F\u002Fresearch.nccgroup.com\u002F?research=Technical%20advisories",[56],{"url":61,"source":62,"tags":63},"https:\u002F\u002Fwww.nagios.com\u002Fdownloads\u002Fnagios-log-server\u002Fchange-log\u002F","Nagios",[64,65],"Release Notes","Vendor Advisory",3,[68],{"id":69,"name":70,"description":71,"extendedDescription":72,"status":73,"abstraction":74,"structure":75},"CWE-79","Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.","Cross-site scripting (XSS) vulnerabilities occur when:\nThere are three main kinds of XSS:\nOnce the malicious script is injected, the attacker can perform a variety of malicious activities. The attacker could transfer private information, such as cookies that may include session information, from the victim's machine to the attacker. The attacker could send malicious requests to a web site on behalf of the victim, which could be especially dangerous to the site if the victim has administrator privileges to manage that site. Phishing attacks could be used to emulate trusted web sites and trick the victim into entering a password, allowing the attacker to compromise the victim's account on that web site. Finally, the script could exploit a vulnerability in the web browser itself possibly taking over the victim's machine, sometimes referred to as \"drive-by hacking.\"\nIn many cases, the attack can be launched without the victim even being aware of it. Even with careful users, attackers frequently use a variety of methods to encode the malicious portion of the attack, such as URL encoding or Unicode, so the request looks less suspicious.","Stable","Base","Simple",false,[],{"title":79,"metaDescription":80,"keywords":81,"canonicalUrl":82,"structuredData":83},"What is CVE-2021-35478? Vulnerability Analysis | Security Advisory | Precursor Intelligence","Comprehensive analysis of CVE-2021-35478, a medium severity cyber security vulnerability from 2021. High exploit probability (76.6%). Nagios Log Server befor...","CVE-2021-35478, CVE-2021-35478 vulnerability, CVE-2021-35478 security, medium severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research, vulnerability assessment, cyber threats, 2021, CVSS score, exploit, patch, remediation, nagios security, log_server vulnerability, high risk vulnerability, actively exploited, exploit available","\u002Fwhat-is\u002Fcve-2021-35478",{"@context":84,"@type":85,"headline":79,"description":80,"datePublished":10,"dateModified":11,"author":86,"publisher":90,"about":94,"mainEntityOfPage":98,"articleSection":101,"keywords":102},"https:\u002F\u002Fschema.org","TechArticle",{"@type":87,"name":88,"url":89},"Organization","Precursor Intelligence","https:\u002F\u002Fprecursorintelligence.com",{"@type":87,"name":88,"url":89,"logo":91},{"@type":92,"url":93},"ImageObject","https:\u002F\u002Fprecursorintelligence.com\u002Fimg\u002Flogos\u002Feplogo.png",{"@type":95,"name":6,"description":96,"additionalType":97},"Thing","Cybersecurity Vulnerability","https:\u002F\u002Fschema.org\u002FSoftwareBug",{"@type":99,"@id":100},"WebPage","https:\u002F\u002Fprecursorintelligence.com\u002Fwhat-is\u002Fcve-2021-35478","Cybersecurity","CVE-2021-35478, CVE-2021-35478 vulnerability, CVE-2021-35478 security, medium severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research",[104],{"Operator":27,"Negate":27,"Nodes":105},[106],{"Operator":107,"Negate":27,"CPEMatch":108},"OR",[109],{"Vulnerable":4,"Criteria":48,"MatchCriteriaID":110,"VersionStartExcluding":27,"VersionStartIncluding":27,"VersionEndExcluding":111,"VersionEndIncluding":27},"D0080172-D0FB-4488-A74D-58DAC7DCFB20","2.1.9",[],[114,121],{"id":115,"eventType":116,"eventTime":117,"details":118,"label":119,"color":120},"e75d9afc-f750-461f-ad90-e90ee70d3fde","HIGH_EPSS_DELTA","2025-11-19T04:05:58.374635+00:00","Daily EPSS score increased by 0.218 on 2023-12-30","EPSS Score Increased","red",{"id":122,"eventType":123,"eventTime":124,"details":125,"label":126,"color":127},"4df5a1e4-f83e-41bd-9ff4-5b824854bc66","LOW_EPSS_DELTA","2025-11-22T04:05:46.78343+00:00","Daily EPSS score decreased by 0.218 on 2023-12-30","EPSS Score Decreased","green",{"lastModified":11,"cacheTime":129,"version":33},1792375414758,{"score":131,"band":42,"action":132,"scoredAt":133},55,"Plan remediation","2026-10-16T06:51:41.059097+00:00"]