{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-87930", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-09-09T16:12:38.084Z", "datePublished": "2026-09-09T16:45:00.798Z", "dateUpdated": "2026-09-09T17:24:57.540Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-09-09T16:45:00.798Z"}, "datePublic": "2026-09-09T00:00:00.000Z", "title": "MaxSite CMS through 109.6 PHP Object Injection via ci_session", "descriptions": [{"lang": "en", "value": "MaxSite CMS through 109.6 passes the ci_session cookie to unserialize() without class restrictions, allowing unauthenticated attackers to inject PHP objects. Attackers can forge valid session cookies using the hardcoded encryption key to trigger magic methods and corrupt application state or achieve code execution if gadget classes exist."}], "tags": ["x_open-source", "unsupported-when-assigned"], "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-502", "description": "Deserialization of Untrusted Data", "type": "CWE"}]}], "affected": [{"defaultStatus": "unaffected", "vendor": "MaxSite", "product": "MaxSite CMS", "packageURL": "pkg:github/maxsite/cms", "repo": "https://github.com/maxsite/cms", "versions": [{"version": "0.78", "lessThanOrEqual": "109.6", "status": "affected", "versionType": "custom"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:max-3000:maxsite_cms:*:*:*:*:*:*:*:*", "versionStartIncluding": "0.78", "versionEndIncluding": "109.6"}]}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "NONE", "version": "4.0", "baseSeverity": "CRITICAL", "baseScore": 9.2, "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}}, {"cvssV3_1": {"attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "version": "3.1", "baseSeverity": "HIGH", "baseScore": 8.1, "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"}}], "references": [{"url": "https://github.com/maxsite/cms", "tags": ["product"]}, {"url": "https://github.com/EviL0rd/maxsite-cve6/blob/main/2026.09.08-maxsite-cms-unsafe-unserialize-object-injection.md", "tags": ["exploit", "technical-description"]}, {"url": "https://github.com/maxsite/cms/blob/2ca0a0c7d1d71106a25dbb0f2aedaaefbf12802c/system/libraries/Session.php#L670-L680", "tags": ["technical-description"]}, {"url": "https://github.com/maxsite/cms/blob/2ca0a0c7d1d71106a25dbb0f2aedaaefbf12802c/system/libraries/Session.php#L740-L742", "tags": ["technical-description"]}, {"url": "https://github.com/EviL0rd/maxsite-cve4/blob/main/2026.09.08-maxsite-cms-hardcoded-session-key-auth-bypass.md", "tags": ["technical-description"]}, {"url": "https://github.com/maxsite/cms/blob/2ca0a0c7d1d71106a25dbb0f2aedaaefbf12802c/application/config/config.php#L230-L254", "tags": ["technical-description"]}, {"name": "VulnCheck Advisory: MaxSite CMS through 109.6 PHP Object Injection via ci_session", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/maxsite-cms-through-109.6-php-object-injection-via-ci-session"}], "credits": [{"lang": "en", "value": "EVIL0RD", "type": "reporter"}], "source": {"discovery": "EXTERNAL"}, "x_generator": {"engine": "vulncheck-endgame"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-09-09T17:22:33.214701Z", "id": "CVE-2026-87930", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-09T17:24:57.540Z"}}]}}

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-87930", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-09-09T16:12:38.084Z", "datePublished": "2026-09-09T16:45:00.798Z", "dateUpdated": "2026-09-09T17:24:57.540Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-09-09T16:45:00.798Z"}, "datePublic": "2026-09-09T00:00:00.000Z", "title": "MaxSite CMS through 109.6 PHP Object Injection via ci_session", "descriptions": [{"lang": "en", "value": "MaxSite CMS through 109.6 passes the ci_session cookie to unserialize() without class restrictions, allowing unauthenticated attackers to inject PHP objects. Attackers can forge valid session cookies using the hardcoded encryption key to trigger magic methods and corrupt application state or achieve code execution if gadget classes exist."}], "tags": ["x_open-source", "unsupported-when-assigned"], "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-502", "description": "Deserialization of Untrusted Data", "type": "CWE"}]}], "affected": [{"defaultStatus": "unaffected", "vendor": "MaxSite", "product": "MaxSite CMS", "packageURL": "pkg:github/maxsite/cms", "repo": "https://github.com/maxsite/cms", "versions": [{"version": "0.78", "lessThanOrEqual": "109.6", "status": "affected", "versionType": "custom"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:max-3000:maxsite_cms:*:*:*:*:*:*:*:*", "versionStartIncluding": "0.78", "versionEndIncluding": "109.6"}]}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "NONE", "version": "4.0", "baseSeverity": "CRITICAL", "baseScore": 9.2, "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}}, {"cvssV3_1": {"attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "version": "3.1", "baseSeverity": "HIGH", "baseScore": 8.1, "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"}}], "references": [{"url": "https://github.com/maxsite/cms", "tags": ["product"]}, {"url": "https://github.com/EviL0rd/maxsite-cve6/blob/main/2026.09.08-maxsite-cms-unsafe-unserialize-object-injection.md", "tags": ["exploit", "technical-description"]}, {"url": "https://github.com/maxsite/cms/blob/2ca0a0c7d1d71106a25dbb0f2aedaaefbf12802c/system/libraries/Session.php#L670-L680", "tags": ["technical-description"]}, {"url": "https://github.com/maxsite/cms/blob/2ca0a0c7d1d71106a25dbb0f2aedaaefbf12802c/system/libraries/Session.php#L740-L742", "tags": ["technical-description"]}, {"url": "https://github.com/EviL0rd/maxsite-cve4/blob/main/2026.09.08-maxsite-cms-hardcoded-session-key-auth-bypass.md", "tags": ["technical-description"]}, {"url": "https://github.com/maxsite/cms/blob/2ca0a0c7d1d71106a25dbb0f2aedaaefbf12802c/application/config/config.php#L230-L254", "tags": ["technical-description"]}, {"name": "VulnCheck Advisory: MaxSite CMS through 109.6 PHP Object Injection via ci_session", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/maxsite-cms-through-109.6-php-object-injection-via-ci-session"}], "credits": [{"lang": "en", "value": "EVIL0RD", "type": "reporter"}], "source": {"discovery": "EXTERNAL"}, "x_generator": {"engine": "vulncheck-endgame"}}, "adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-87930", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-09-09T17:22:33.214701Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-09T17:24:52.802Z"}}]}}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "packageURL": "pkg:github/maxsite/cms", "product": "MaxSite CMS", "repo": "https://github.com/maxsite/cms", "vendor": "MaxSite", "versions": [{"lessThanOrEqual": "109.6", "status": "affected", "version": "0.78", "versionType": "custom"}]}], "source": "disclosure@vulncheck.com"}], "cveTags": [{"sourceIdentifier": "disclosure@vulncheck.com", "tags": ["unsupported-when-assigned"]}], "descriptions": [{"lang": "en", "value": "MaxSite CMS through 109.6 passes the ci_session cookie to unserialize() without class restrictions, allowing unauthenticated attackers to inject PHP objects. Attackers can forge valid session cookies using the hardcoded encryption key to trigger magic methods and corrupt application state or achieve code execution if gadget classes exist."}], "id": "CVE-2026-87930", "lastModified": "2026-09-09T20:14:00.420", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 5.9, "source": "disclosure@vulncheck.com", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 9.2, "baseSeverity": "CRITICAL", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "disclosure@vulncheck.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-87930", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-09-09T17:22:33.214701Z", "version": "2.0.3"}}]}, "published": "2026-09-09T17:17:53.990", "references": [{"source": "disclosure@vulncheck.com", "url": "https://github.com/EviL0rd/maxsite-cve4/blob/main/2026.09.08-maxsite-cms-hardcoded-session-key-auth-bypass.md"}, {"source": "disclosure@vulncheck.com", "url": "https://github.com/EviL0rd/maxsite-cve6/blob/main/2026.09.08-maxsite-cms-unsafe-unserialize-object-injection.md"}, {"source": "disclosure@vulncheck.com", "url": "https://github.com/maxsite/cms"}, {"source": "disclosure@vulncheck.com", "url": "https://github.com/maxsite/cms/blob/2ca0a0c7d1d71106a25dbb0f2aedaaefbf12802c/application/config/config.php#L230-L254"}, {"source": "disclosure@vulncheck.com", "url": "https://github.com/maxsite/cms/blob/2ca0a0c7d1d71106a25dbb0f2aedaaefbf12802c/system/libraries/Session.php#L670-L680"}, {"source": "disclosure@vulncheck.com", "url": "https://github.com/maxsite/cms/blob/2ca0a0c7d1d71106a25dbb0f2aedaaefbf12802c/system/libraries/Session.php#L740-L742"}, {"source": "disclosure@vulncheck.com", "url": "https://www.vulncheck.com/advisories/maxsite-cms-through-109.6-php-object-injection-via-ci-session"}], "sourceIdentifier": "disclosure@vulncheck.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-502"}], "source": "disclosure@vulncheck.com", "type": "Secondary"}]}

{}

{"created": "2026-09-09T18:30:13.706979+00:00", "updated": "2026-09-09T18:30:13.706991+00:00", "vendors": []}