{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2016-20031", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-03-15T12:37:20.074Z", "datePublished": "2026-03-15T13:35:35.350Z", "dateUpdated": "2026-03-15T13:35:35.350Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-03-15T13:35:35.350Z"}, "datePublic": "2016-08-31T00:00:00.000Z", "title": "ZKTeco ZKBioSecurity 3.0 Local Authorization Bypass via visLogin.jsp", "descriptions": [{"lang": "en", "value": "ZKTeco ZKBioSecurity 3.0 contains a local authorization bypass vulnerability in visLogin.jsp that allows attackers to authenticate without valid credentials by spoofing localhost requests. Attackers can exploit the EnvironmentUtil.getClientIp() method which treats IPv6 loopback address 0:0:0:0:0:0:0:1 as 127.0.0.1 and authenticates using the IP as username with hardcoded password 123456 to access sensitive information and perform unauthorized actions."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Use of Hard-coded Credentials", "cweId": "CWE-798", "type": "CWE"}]}], "affected": [{"vendor": "ZKTeco Inc.", "product": "ZKTeco ZKBioSecurity", "versions": [{"version": "3.0.1.0_R_230", "status": "affected"}]}], "metrics": [{"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "LOCAL", "baseScore": 6.8, "baseSeverity": "MEDIUM", "exploitMaturity": "NOT_DEFINED", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS"}, {"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "NONE", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "format": "CVSS"}], "references": [{"url": "https://www.zeroscience.mk/en/vulnerabilities/ZSL-2016-5367.php", "name": "Zero Science Lab Disclosure", "tags": ["third-party-advisory"]}, {"url": "https://cxsecurity.com/issue/WLB-2016090003", "name": "CXSecurity", "tags": ["third-party-advisory"]}, {"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/116488", "name": "IBM X-Force Exchange", "tags": ["vdb-entry"]}, {"url": "https://packetstormsecurity.com/files/138571", "name": "Packet Storm Security", "tags": ["exploit"]}, {"url": "https://www.exploit-db.com/exploits/40327/", "name": "Reference", "tags": ["exploit"]}, {"name": "VulnCheck Advisory: ZKTeco ZKBioSecurity 3.0 Local Authorization Bypass via visLogin.jsp", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/zkteco-zkbiosecurity-local-authorization-bypass-via-vislogin-jsp"}], "credits": [{"lang": "en", "value": "LiquidWorm as Gjoko Krstic of Zero Science Lab", "type": "finder"}], "x_generator": {"engine": "vulncheck"}}}}

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