CVE-2026-117554

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-117554", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-10-27T11:25:20.165Z", "datePublished": "2026-10-27T13:07:50.357Z", "dateUpdated": "2026-11-02T15:54:22.023Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-10-27T13:07:50.357Z"}, "datePublic": "2026-10-08T00:00:00.000Z", "title": "Admidio before 5.0.17 Event Guest Restriction Bypass via events_function.php", "descriptions": [{"lang": "en", "value": "Admidio before 5.0.17 contains an improper access control vulnerability that allows authenticated members to register event guests by submitting the additional_guests field when guests are disallowed. Attackers can set additional_guests to the remaining seat count in modules/events/events_function.php to exhaust event capacity and block other members from registering."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Client-Side Enforcement of Server-Side Security", "cweId": "CWE-602", "type": "CWE"}]}], "affected": [{"vendor": "admidio", "product": "admidio", "defaultStatus": "unaffected", "packageURL": "pkg:composer/admidio/admidio", "versions": [{"status": "affected", "version": "0", "lessThan": "5.0.17", "versionType": "semver"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:admidio:admidio:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.0.17"}]}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM"}}, {"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE", "baseScore": 4.3, "baseSeverity": "MEDIUM"}}], "references": [{"url": "https://github.com/Admidio/admidio/issues/2231", "tags": ["issue-tracking"], "name": "GitHub Issue #2231"}, {"url": "https://github.com/Admidio/admidio", "tags": ["product"]}, {"url": "https://github.com/Admidio/admidio/security/advisories/GHSA-92g9-59rr-c3qg", "tags": ["vendor-advisory"], "name": "GitHub Security Advisory (GHSA-92g9-59rr-c3qg)"}, {"url": "https://github.com/Admidio/admidio/commit/5b0ee3585d2a69a6e85fee00b7b93f3ebc1e44d9", "tags": ["patch"]}, {"url": "https://github.com/Admidio/admidio/releases/tag/v5.0.17", "tags": ["release-notes"], "name": "admidio v5.0.17 Release Notes"}, {"url": "https://github.com/Admidio/admidio/blob/v5.0.16/modules/events/events_function.php#L446-L462", "tags": ["technical-description"]}, {"name": "VulnCheck Advisory: Admidio before 5.0.17 Event Guest Restriction Bypass via events_function.php", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/admidio-before-5.0.17-event-guest-restriction-bypass-via-events-function-php"}], "credits": [{"lang": "en", "value": "gwangwon0807", "type": "finder"}, {"lang": "en", "value": "choewonwoo1817", "type": "finder"}, {"lang": "en", "value": "J0hnathanKim", "type": "finder"}, {"lang": "en", "value": "Kamba-netizen", "type": "finder"}, {"lang": "en", "value": "t-211", "type": "finder"}, {"lang": "en", "value": "xo0102", "type": "finder"}, {"lang": "en", "value": "Fasse", "type": "remediation developer"}], "x_generator": {"engine": "vulncheck-endgame"}}, "adp": [{"references": [{"url": "https://github.com/Admidio/admidio/security/advisories/GHSA-92g9-59rr-c3qg", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-11-02T15:53:51.050433Z", "id": "CVE-2026-117554", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-02T15:54:22.023Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-117554", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-11-02T15:53:51.050433Z"}}}], "references": [{"url": "https://github.com/Admidio/admidio/security/advisories/GHSA-92g9-59rr-c3qg", "tags": ["exploit"]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-02T15:54:17.153Z"}}], "cna": {"title": "Admidio before 5.0.17 Event Guest Restriction Bypass via events_function.php", "credits": [{"lang": "en", "type": "finder", "value": "gwangwon0807"}, {"lang": "en", "type": "finder", "value": "choewonwoo1817"}, {"lang": "en", "type": "finder", "value": "J0hnathanKim"}, {"lang": "en", "type": "finder", "value": "Kamba-netizen"}, {"lang": "en", "type": "finder", "value": "t-211"}, {"lang": "en", "type": "finder", "value": "xo0102"}, {"lang": "en", "type": "remediation developer", "value": "Fasse"}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "baseScore": 5.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "LOW", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE"}}, {"format": "CVSS", "cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}}], "affected": [{"vendor": "admidio", "product": "admidio", "versions": [{"status": "affected", "version": "0", "lessThan": "5.0.17", "versionType": "semver"}], "packageURL": "pkg:composer/admidio/admidio", "defaultStatus": "unaffected"}], "datePublic": "2026-10-08T00:00:00.000Z", "references": [{"url": "https://github.com/Admidio/admidio/issues/2231", "name": "GitHub Issue #2231", "tags": ["issue-tracking"]}, {"url": "https://github.com/Admidio/admidio", "tags": ["product"]}, {"url": "https://github.com/Admidio/admidio/security/advisories/GHSA-92g9-59rr-c3qg", "name": "GitHub Security Advisory (GHSA-92g9-59rr-c3qg)", "tags": ["vendor-advisory"]}, {"url": "https://github.com/Admidio/admidio/commit/5b0ee3585d2a69a6e85fee00b7b93f3ebc1e44d9", "tags": ["patch"]}, {"url": "https://github.com/Admidio/admidio/releases/tag/v5.0.17", "name": "admidio v5.0.17 Release Notes", "tags": ["release-notes"]}, {"url": "https://github.com/Admidio/admidio/blob/v5.0.16/modules/events/events_function.php#L446-L462", "tags": ["technical-description"]}, {"url": "https://www.vulncheck.com/advisories/admidio-before-5.0.17-event-guest-restriction-bypass-via-events-function-php", "name": "VulnCheck Advisory: Admidio before 5.0.17 Event Guest Restriction Bypass via events_function.php", "tags": ["third-party-advisory"]}], "x_generator": {"engine": "vulncheck-endgame"}, "descriptions": [{"lang": "en", "value": "Admidio before 5.0.17 contains an improper access control vulnerability that allows authenticated members to register event guests by submitting the additional_guests field when guests are disallowed. Attackers can set additional_guests to the remaining seat count in modules/events/events_function.php to exhaust event capacity and block other members from registering."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-602", "description": "Client-Side Enforcement of Server-Side Security"}]}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:admidio:admidio:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.0.17"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-10-27T13:07:50.357Z"}}}, "cveMetadata": {"cveId": "CVE-2026-117554", "state": "PUBLISHED", "dateUpdated": "2026-11-02T15:54:22.023Z", "dateReserved": "2026-10-27T11:25:20.165Z", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "datePublished": "2026-10-27T13:07:50.357Z", "assignerShortName": "VulnCheck"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "packageURL": "pkg:composer/admidio/admidio", "product": "admidio", "vendor": "admidio", "versions": [{"lessThan": "5.0.17", "status": "affected", "version": "0", "versionType": "semver"}]}], "source": "disclosure@vulncheck.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Admidio before 5.0.17 contains an improper access control vulnerability that allows authenticated members to register event guests by submitting the additional_guests field when guests are disallowed. Attackers can set additional_guests to the remaining seat count in modules/events/events_function.php to exhaust event capacity and block other members from registering."}], "id": "CVE-2026-117554", "lastModified": "2026-11-02T16:17:30.397", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 1.4, "source": "disclosure@vulncheck.com", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 5.3, "baseSeverity": "MEDIUM", "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": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/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": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "disclosure@vulncheck.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-117554", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-02T15:53:51.050433Z", "version": "2.0.3"}}]}, "published": "2026-10-27T14:16:35.990", "references": [{"source": "disclosure@vulncheck.com", "url": "https://github.com/Admidio/admidio"}, {"source": "disclosure@vulncheck.com", "url": "https://github.com/Admidio/admidio/blob/v5.0.16/modules/events/events_function.php#L446-L462"}, {"source": "disclosure@vulncheck.com", "url": "https://github.com/Admidio/admidio/commit/5b0ee3585d2a69a6e85fee00b7b93f3ebc1e44d9"}, {"source": "disclosure@vulncheck.com", "url": "https://github.com/Admidio/admidio/issues/2231"}, {"source": "disclosure@vulncheck.com", "url": "https://github.com/Admidio/admidio/releases/tag/v5.0.17"}, {"source": "disclosure@vulncheck.com", "url": "https://github.com/Admidio/admidio/security/advisories/GHSA-92g9-59rr-c3qg"}, {"source": "disclosure@vulncheck.com", "url": "https://www.vulncheck.com/advisories/admidio-before-5.0.17-event-guest-restriction-bypass-via-events-function-php"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/Admidio/admidio/security/advisories/GHSA-92g9-59rr-c3qg"}], "sourceIdentifier": "disclosure@vulncheck.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-602"}], "source": "disclosure@vulncheck.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,5.0.17)"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "admidio", "source": "cna", "vendor": "admidio"}, "product": "admidio", "vendor": "admidio"}], "created": "2026-10-27T14:30:04.722330+00:00", "updated": "2026-10-27T16:15:04.524872+00:00", "vendors": ["admidio", "admidio$PRODUCT$admidio"]}