CVE-2026-7011

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{"affected": [{"affectedData": [{"modules": ["Antispam 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 weakness has been identified in MaxSite CMS up to 109.3. Affected by this vulnerability is an unknown functionality of the file /admin/plugin_antispam of the component Antispam Plugin. Executing a manipulation of the argument f_logging_file can lead to cross site scripting. It is possible to launch the attack remotely. The exploit has been made available to the public and could be used for attacks. Upgrading to version 109.4 addresses this issue. This patch is called 8a3946bd0a54bfb72a4d57179fcd253f2c550cd7. Upgrading the affected component is advised. 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 ha identificado una debilidad en MaxSite CMS hasta la versi\u00f3n 109.3. Afectada por esta vulnerabilidad es una funcionalidad desconocida del archivo /admin/plugin_antispam del componente Antispam plugin. La ejecuci\u00f3n de una manipulaci\u00f3n del argumento f_logging_file puede conducir a XSS. Es posible lanzar el ataque de forma remota. El exploit se ha puesto a disposici\u00f3n del p\u00fablico y podr\u00eda utilizarse para ataques. La actualizaci\u00f3n a la versi\u00f3n 109.4 soluciona este problema. Este parche se llama 8a3946bd0a54bfb72a4d57179fcd253f2c550cd7. Se aconseja actualizar el componente afectado. El proveedor fue informado con antelaci\u00f3n 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 mediante \u201chtmlspecialchars()\u201d ya se ha corregido en el \u00faltimo parche para evitar la visualizaci\u00f3n incorrecta de datos.\u2019"}], "id": "CVE-2026-7011", "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-2026-7011", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-04-27T13:50:11.285947Z", "version": "2.0.3"}}]}, "published": "2026-04-26T01:15:59.590", "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-antispam-plugin-maxsite-cms.pdf"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/submit/796736"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/vuln/359591"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/vuln/359591/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": "2026-04-28T05:27:30.374045+00:00", "value": {"mitigation_remediation": ["Apply the vendor\u2011supplied patch by upgrading MaxSite CMS to version 109.4 or later.", "If upgrading is delayed, disable the Antispam Plugin or remove the f_logging_file entry from the administration interface to stop unescaped data from being displayed.", "For custom builds, enforce redirection of any user\u2011supplied f_logging_file content through htmlspecialchars() before storing or rendering it, thereby preventing XSS injection."], "summary": {"action": "Upgrade Immediately", "impact": "Cross\u2011Site Scripting (stored XSS)"}, "threat_synthesis": {"affected_systems": "All installations of MaxSite CMS containing the Antispam Plugin with a component version of 109.3 or earlier are affected. The vendor identifies the fix in release 109.4, so any version lower than 109.4, including 109.0 through 109.3, must be upgraded. The plugin resides at /admin/plugin_antispam and is part of the main CMS core. Systems running newer releases beyond 109.4 are not vulnerable.", "description_and_impact": "The vulnerability resides in the Antispam Plugin of MaxSite CMS, where manipulation of the f_logging_file argument allows an attacker to inject malicious script code that is then rendered in the user interface. This stored cross\u2011site scripting flaw means that a remote user can cause arbitrary script execution in the browsers of any user who views the affected page, enabling phishing, credential theft, or other malicious actions. The weakness is classified under CWE\u201179 for input data not validated for HTML context and CWE\u201194 for code injection potential.", "risk_and_exploitability": "The CVSS base score is 4.8, reflecting a moderate impact that primarily threatens confidentiality and integrity through client\u2011side script execution. The EPSS score of less than 1% indicates a low probability of exploitation in the wild; however, public proof\u2011of\u2011concept code exists, so an attacker could still launch an attack if no patch is applied. The vulnerability is not listed in the CISA KEV catalog, but the publicly available exploit warrants prompt remediation."}}}}, "created": "2026-04-27T18:41:59.100129+00:00", "updated": "2026-04-28T05:30:23.369006+00:00", "vendors": ["maxsite", "maxsite$PRODUCT$cms"]}