CVE-2026-7016

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{"affected": [{"affectedData": [{"modules": ["ushki Plugin"], "product": "CMS", "vendor": "MaxSite", "versions": [{"status": "affected", "version": "109.0"}, {"status": "affected", "version": "109.1"}, {"status": "affected", "version": "109.2"}, {"status": "affected", "version": "109.3"}, {"status": "unaffected", "version": "109.4"}]}], "source": "cna@vuldb.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability was found in MaxSite CMS up to 109.3. Impacted is an unknown function of the component ushki Plugin. Performing a manipulation of the argument f_ushka_new/f_ushk results in cross site scripting. Remote exploitation of the attack is possible. The exploit has been made public and could be used. Upgrading to version 109.4 is recommended to address this issue. The patch is named 8a3946bd0a54bfb72a4d57179fcd253f2c550cd7. Upgrading the affected component is recommended. The vendor was informed early about this issue. They classify it as a \"Self-XSS\". They deployed a countermeasure: \"Nevertheless, we consider this a violation of secure coding standards. The lack of filtering via `htmlspecialchars()` has already been fixed in the latest patch to prevent incorrect data display.\""}, {"lang": "es", "value": "Se encontr\u00f3 una vulnerabilidad en MaxSite CMS hasta la versi\u00f3n 109.3. Afectada es una funci\u00f3n desconocida del componente plugin ushki. Realizar una manipulaci\u00f3n del argumento f_ushka_new/f_ushk resulta en XSS. La explotaci\u00f3n remota del ataque es posible. El exploit ha sido hecho p\u00fablico y podr\u00eda ser usado. Se recomienda actualizar a la versi\u00f3n 109.4 para abordar este problema. El parche se llama 8a3946bd0a54bfb72a4d57179fcd253f2c550cd7. Se recomienda actualizar el componente afectado. El proveedor fue informado tempranamente sobre este problema. Lo clasifican como un \u2019Self-XSS\u2019. Desplegaron una contramedida: \u2019No obstante, consideramos esto una violaci\u00f3n de los est\u00e1ndares de codificaci\u00f3n segura. La falta de filtrado a trav\u00e9s de \u2019htmlspecialchars()\u2019 ya ha sido corregida en el \u00faltimo parche para evitar la visualizaci\u00f3n incorrecta de datos.\u2019"}], "id": "CVE-2026-7016", "lastModified": "2026-10-26T22:10:00.163", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "LOW", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "MULTIPLE", "availabilityImpact": "NONE", "baseScore": 3.3, "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:M/C:N/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 6.4, "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": 2.4, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 0.9, "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": 1.9, "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": "HIGH", "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:H/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-2026-7016", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-04-27T13:51:10.246034Z", "version": "2.0.3"}}]}, "published": "2026-04-26T04:16:08.853", "references": [{"source": "cna@vuldb.com", "url": "https://github.com/maxsite/cms/"}, {"source": "cna@vuldb.com", "url": "https://github.com/maxsite/cms/commit/8a3946bd0a54bfb72a4d57179fcd253f2c550cd7"}, {"source": "cna@vuldb.com", "url": "https://github.com/maxsite/cms/releases/tag/v109"}, {"source": "cna@vuldb.com", "url": "https://github.com/wnaspy/CVE/blob/main/Report-%20Stored%20XSS-in-ushki-plugin-maxsite-cms.pdf.pdf"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/submit/796741"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/vuln/359596"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/vuln/359596/cti"}], "sourceIdentifier": "cna@vuldb.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}, {"lang": "en", "value": "CWE-94"}], "source": "cna@vuldb.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "109.0"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "109.1"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "109.2"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "109.3"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "109.4"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "CMS", "source": "cna", "vendor": "MaxSite"}, "product": "cms", "vendor": "maxsite"}], "analysis": {"en": {"generated_at": "2026-04-28T05:25:22.312816+00:00", "value": {"mitigation_remediation": ["Upgrade MaxSite CMS to version 109.4 or later, which includes the fixed patch commit.", "If upgrading is not feasible, apply the source code patch that introduces proper output escaping (e.g., htmlspecialchars()) for the f_ushka_new and f_ushk fields or otherwise sanitize user input before rendering.", "Deploy a Content Security Policy that restricts inline scripts and mandates that only trusted script sources be executed, thereby limiting the impact of any remaining XSS vectors."], "summary": {"action": "Apply Patch", "impact": "Cross\u2011Site Scripting (XSS)"}, "threat_synthesis": {"affected_systems": "The issue affects all installations of MaxSite CMS running the ushki Plugin with version numbers up to and including 109.3. The vendor\u2019s security advisory specifies that upgrading to version 109.4, which contains patch commit 8a3946bd0a54bfb72a4d57179fcd253f2c550cd7, resolves the flaw. No other product versions or vendors are listed, so the vulnerability is specific to MaxSite CMS.", "description_and_impact": "A vulnerability was identified in the ushki Plugin of MaxSite CMS versions up to 109.3 that allows an attacker to inject malicious scripts via the f_ushka_new and f_ushk input parameters. The lack of proper output filtering (e.g., missing htmlspecialchars()) enables a stored cross\u2011site scripting flaw (CWE\u201179) that can be triggered remotely. An attacker who successfully injects JavaScript could hijack user sessions, deface content, or exfiltrate sensitive data from the victim\u2019s browser.", "risk_and_exploitability": "The CVSS score of 4.8 indicates a moderate severity, and the EPSS score of <1% reflects a very low probability of exploitation at this time. Nonetheless, the vulnerability has a publicly available exploit, and remote exploitation is feasible via crafted web requests to the affected plugin. This flaw is not currently listed in the CISA KEV catalog, but the public nature of the exploit means administrators should not underestimate the risk. Implementing the recommended patch and validating that input is properly sanitized remain the key mitigations."}}}}, "created": "2026-04-27T18:41:59.098258+00:00", "updated": "2026-04-28T05:30:23.358259+00:00", "vendors": ["maxsite", "maxsite$PRODUCT$cms"]}