CVE-2026-4239

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-4239", "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5", "state": "PUBLISHED", "assignerShortName": "VulDB", "dateReserved": "2026-03-15T20:37:03.899Z", "datePublished": "2026-03-16T13:02:08.856Z", "dateUpdated": "2026-03-16T14:42:22.402Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5", "shortName": "VulDB", "dateUpdated": "2026-03-16T13:02:08.856Z"}, "title": "Lagom WHMCS Template Datatables prototype pollution", "problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-1321", "lang": "en", "description": "Improperly Controlled Modification of Object Prototype Attributes"}]}, {"descriptions": [{"type": "CWE", "cweId": "CWE-94", "lang": "en", "description": "Code Injection"}]}], "affected": [{"vendor": "Lagom", "product": "WHMCS Template", "versions": [{"version": "2.3.0", "status": "affected"}, {"version": "2.3.1", "status": "affected"}, {"version": "2.3.2", "status": "affected"}, {"version": "2.3.3", "status": "affected"}, {"version": "2.3.4", "status": "affected"}, {"version": "2.3.5", "status": "affected"}, {"version": "2.3.6", "status": "affected"}, {"version": "2.3.7", "status": "affected"}], "modules": ["Datatables"]}], "descriptions": [{"lang": "en", "value": "A vulnerability was found in Lagom WHMCS Template up to 2.3.7. Impacted is an unknown function of the component Datatables. The manipulation results in improperly controlled modification of object prototype attributes. It is possible to launch the attack remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way."}], "metrics": [{"cvssV4_0": {"version": "4.0", "baseScore": 5.1, "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P", "baseSeverity": "MEDIUM"}}, {"cvssV3_1": {"version": "3.1", "baseScore": 3.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R", "baseSeverity": "LOW"}}, {"cvssV3_0": {"version": "3.0", "baseScore": 3.5, "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R", "baseSeverity": "LOW"}}, {"cvssV2_0": {"version": "2.0", "baseScore": 4, "vectorString": "AV:N/AC:L/Au:S/C:N/I:P/A:N/E:POC/RL:ND/RC:UR"}}], "timeline": [{"time": "2026-03-15T00:00:00.000Z", "lang": "en", "value": "Advisory disclosed"}, {"time": "2026-03-15T01:00:00.000Z", "lang": "en", "value": "VulDB entry created"}, {"time": "2026-03-15T21:43:11.000Z", "lang": "en", "value": "VulDB entry last update"}], "credits": [{"lang": "en", "value": "s4nnty (VulDB User)", "type": "reporter"}, {"lang": "en", "value": "VulDB", "type": "coordinator"}], "references": [{"url": "https://vuldb.com/?id.351181", "name": "VDB-351181 | Lagom WHMCS Template Datatables prototype pollution", "tags": ["vdb-entry"]}, {"url": "https://vuldb.com/?ctiid.351181", "name": "VDB-351181 | CTI Indicators (IOB, IOC, TTP)", "tags": ["signature", "permissions-required"]}, {"url": "https://vuldb.com/?submit.771350", "name": "Submit #771350 | Lagom Lagom WHMCS Template * Prototype Pollution", "tags": ["third-party-advisory"]}, {"url": "https://github.com/devsamuelsantiago/lagom-prototype-pollution-poc/", "tags": ["exploit"]}, {"url": "https://github.com/devsamuelsantiago/lagom-prototype-pollution-poc/blob/main/lagom-prototype-pollution-poc.js", "tags": ["exploit"]}]}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-03-16T14:42:17.217378Z", "id": "CVE-2026-4239", "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": "2026-03-16T14:42:22.402Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-4239", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-03-16T14:42:17.217378Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-03-16T14:42:19.236Z"}}], "cna": {"title": "Lagom WHMCS Template Datatables prototype pollution", "credits": [{"lang": "en", "type": "reporter", "value": "s4nnty (VulDB User)"}, {"lang": "en", "type": "coordinator", "value": "VulDB"}], "metrics": [{"cvssV4_0": {"version": "4.0", "baseScore": 5.1, "baseSeverity": "MEDIUM", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P"}}, {"cvssV3_1": {"version": "3.1", "baseScore": 3.5, "baseSeverity": "LOW", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R"}}, {"cvssV3_0": {"version": "3.0", "baseScore": 3.5, "baseSeverity": "LOW", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R"}}, {"cvssV2_0": {"version": "2.0", "baseScore": 4, "vectorString": "AV:N/AC:L/Au:S/C:N/I:P/A:N/E:POC/RL:ND/RC:UR"}}], "affected": [{"vendor": "Lagom", "modules": ["Datatables"], "product": "WHMCS Template", "versions": [{"status": "affected", "version": "2.3.0"}, {"status": "affected", "version": "2.3.1"}, {"status": "affected", "version": "2.3.2"}, {"status": "affected", "version": "2.3.3"}, {"status": "affected", "version": "2.3.4"}, {"status": "affected", "version": "2.3.5"}, {"status": "affected", "version": "2.3.6"}, {"status": "affected", "version": "2.3.7"}]}], "timeline": [{"lang": "en", "time": "2026-03-15T00:00:00.000Z", "value": "Advisory disclosed"}, {"lang": "en", "time": "2026-03-15T01:00:00.000Z", "value": "VulDB entry created"}, {"lang": "en", "time": "2026-03-15T21:43:11.000Z", "value": "VulDB entry last update"}], "references": [{"url": "https://vuldb.com/?id.351181", "name": "VDB-351181 | Lagom WHMCS Template Datatables prototype pollution", "tags": ["vdb-entry"]}, {"url": "https://vuldb.com/?ctiid.351181", "name": "VDB-351181 | CTI Indicators (IOB, IOC, TTP)", "tags": ["signature", "permissions-required"]}, {"url": "https://vuldb.com/?submit.771350", "name": "Submit #771350 | Lagom Lagom WHMCS Template * Prototype Pollution", "tags": ["third-party-advisory"]}, {"url": "https://github.com/devsamuelsantiago/lagom-prototype-pollution-poc/", "tags": ["exploit"]}, {"url": "https://github.com/devsamuelsantiago/lagom-prototype-pollution-poc/blob/main/lagom-prototype-pollution-poc.js", "tags": ["exploit"]}], "descriptions": [{"lang": "en", "value": "A vulnerability was found in Lagom WHMCS Template up to 2.3.7. Impacted is an unknown function of the component Datatables. The manipulation results in improperly controlled modification of object prototype attributes. It is possible to launch the attack remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-1321", "description": "Improperly Controlled Modification of Object Prototype Attributes"}]}, {"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-94", "description": "Code Injection"}]}], "providerMetadata": {"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5", "shortName": "VulDB", "dateUpdated": "2026-03-16T13:02:08.856Z"}}}, "cveMetadata": {"cveId": "CVE-2026-4239", "state": "PUBLISHED", "dateUpdated": "2026-03-16T14:42:22.402Z", "dateReserved": "2026-03-15T20:37:03.899Z", "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5", "datePublished": "2026-03-16T13:02:08.856Z", "assignerShortName": "VulDB"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"modules": ["Datatables"], "product": "WHMCS Template", "vendor": "Lagom", "versions": [{"status": "affected", "version": "2.3.0"}, {"status": "affected", "version": "2.3.1"}, {"status": "affected", "version": "2.3.2"}, {"status": "affected", "version": "2.3.3"}, {"status": "affected", "version": "2.3.4"}, {"status": "affected", "version": "2.3.5"}, {"status": "affected", "version": "2.3.6"}, {"status": "affected", "version": "2.3.7"}]}], "source": "cna@vuldb.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability was found in Lagom WHMCS Template up to 2.3.7. Impacted is an unknown function of the component Datatables. The manipulation results in improperly controlled modification of object prototype attributes. It is possible to launch the attack remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way."}, {"lang": "es", "value": "Una vulnerabilidad fue encontrada en la plantilla Lagom WHMCS hasta la versi\u00f3n 2.3.7. Afectada es una funci\u00f3n desconocida del componente Datatables. La manipulaci\u00f3n resulta en una modificaci\u00f3n de atributos de prototipo de objeto controlada de forma inadecuada. Es posible lanzar el ataque de forma remota. El exploit ha sido hecho p\u00fablico y podr\u00eda ser utilizado. El proveedor fue contactado tempranamente sobre esta divulgaci\u00f3n pero no respondi\u00f3 de ninguna manera."}], "id": "CVE-2026-4239", "lastModified": "2026-06-17T10:56:17.313", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "SINGLE", "availabilityImpact": "NONE", "baseScore": 4.0, "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:S/C:N/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 8.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "cna@vuldb.com", "type": "Secondary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 3.5, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.1, "impactScore": 1.4, "source": "cna@vuldb.com", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 2.0, "baseSeverity": "LOW", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "PROOF_OF_CONCEPT", "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": "PASSIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/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": "cna@vuldb.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-4239", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-03-16T14:42:17.217378Z", "version": "2.0.3"}}]}, "published": "2026-03-16T14:20:18.703", "references": [{"source": "cna@vuldb.com", "url": "https://github.com/devsamuelsantiago/lagom-prototype-pollution-poc/"}, {"source": "cna@vuldb.com", "url": "https://github.com/devsamuelsantiago/lagom-prototype-pollution-poc/blob/main/lagom-prototype-pollution-poc.js"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/?ctiid.351181"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/?id.351181"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/?submit.771350"}], "sourceIdentifier": "cna@vuldb.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-94"}, {"lang": "en", "value": "CWE-1321"}], "source": "cna@vuldb.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.3.0"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.3.1"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.3.2"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.3.3"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.3.4"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.3.5"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.3.6"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.3.7"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "WHMCS Template", "source": "cna", "vendor": "Lagom"}, "product": "whmcs_template", "vendor": "lagom"}], "analysis": {"en": {"generated_at": "2026-03-17T12:07:14.845593+00:00", "value": {"mitigation_remediation": ["Check Lagom's official website or repository for an updated WHMCS Template that fixes the prototype pollution issue.", "If a newer version is available, upgrade your template installation to that version immediately.", "If no update is released, disable or remove the Datatables component from the template to eliminate the vulnerable code path.", "If disabling Datatables is not possible, add strict input sanitization or validation to restrict data that can affect prototype properties.", "Monitor application logs and user activity for signs of exploitation and apply any additional hardening measures."], "summary": {"action": "Patch", "impact": "Prototype Pollution"}, "threat_synthesis": {"affected_systems": "The affected product is Lagom WHMCS Template and all releases up to version 2.3.7 are impacted. Any deployment of these versions that utilizes the Datatables portion of the template is at risk because the vulnerability resides in the Datatables handling code.", "description_and_impact": "A vulnerability was identified in the Lagom WHMCS Template version 2.3.7 and earlier, affecting the component that implements Datatables. By manipulating certain user inputs, an attacker can cause the application to alter JavaScript object prototype properties, a flaw known as prototype pollution. This vulnerability can be triggered remotely and an exploit is publicly available, enabling an adversary to potentially modify application logic or inject malicious data.", "risk_and_exploitability": "The CVSS score for the issue is 5.1, indicating medium severity. EPSS data is not available, and the vulnerability is not listed in CISA's KEV catalog. However, the public nature of the exploit and the remote attack vector increase the likelihood of real\u2011world exploitation. Organizations using the affected template should treat this as a moderate risk and act promptly to remediate."}}}}, "created": "2026-03-17T09:52:57.669890+00:00", "updated": "2026-03-24T10:44:32.767118+00:00", "vendors": ["lagom", "lagom$PRODUCT$whmcs_template"]}