CVE-2026-7015

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{"affected": [{"affectedData": [{"modules": ["Guestbook 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 has been found in MaxSite CMS up to 109.3. This issue affects some unknown processing of the component Guestbook Plugin. Such manipulation of the argument f_text/f_slug/f_limit/f_email leads to cross site scripting. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 109.4 is capable of addressing this issue. The name of the patch is 8a3946bd0a54bfb72a4d57179fcd253f2c550cd7. It is suggested to upgrade the affected component. 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 encontrado una vulnerabilidad en MaxSite CMS hasta la versi\u00f3n 109.3. Este problema afecta a alg\u00fan procesamiento desconocido del componente Guestbook Plugin. Tal manipulaci\u00f3n del argumento f_text/f_slug/f_limit/f_email lleva a secuencias de comandos en sitios cruzados. El ataque puede ser lanzado remotamente. El exploit ha sido divulgado al p\u00fablico y puede ser usado. La actualizaci\u00f3n a la versi\u00f3n 109.4 es capaz de abordar este problema. El nombre del parche es 8a3946bd0a54bfb72a4d57179fcd253f2c550cd7. Se sugiere 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 mediante \u201chtmlspecialchars()\u201d ya ha sido corregida en el \u00faltimo parche para evitar la visualizaci\u00f3n incorrecta de datos.\u2019"}], "id": "CVE-2026-7015", "lastModified": "2026-10-26T21:10:00.170", "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-2026-7015", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-04-27T13:09:19.186040Z", "version": "2.0.3"}}]}, "published": "2026-04-26T03:16:00.530", "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-guestbook-plugin-maxsite-cms.pdf.pdf"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/submit/796740"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/vuln/359595"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/vuln/359595/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": "2026-04-28T05:25:54.749108+00:00", "value": {"mitigation_remediation": ["Upgrade MaxSite CMS to 109.4 or later, which includes the security fix for the Guestbook Plugin.", "If any custom code interacts with the Guestbook fields, enforce proper output escaping (e.g., htmlspecialchars) to eliminate the possibility of unsanitized payloads being stored or displayed.", "If an immediate upgrade is not feasible, disable the Guestbook Plugin or restrict it to trusted users to prevent the injection of malicious scripts until the patch can be applied."], "summary": {"action": "Patch", "impact": "Cross Site Scripting (Stored)"}, "threat_synthesis": {"affected_systems": "MaxSite CMS versions up to and including 109.3 are affected. The Guestbook Plugin is the component that contains the flaw. An update to version 109.4 (patch 8a3946bd0a54bfb72a4d57179fcd253f2c550cd7) removes the unsafe handling of user input.", "description_and_impact": "The vulnerability in MaxSite CMS allows attackers to inject malicious scripts into the Guestbook Plugin by manipulating the arguments f_text, f_slug, f_limit, or f_email. This stored XSS flaw can be triggered remotely through standard web requests to the plugin\u2019s input forms, and once the input is persisted, any user viewing the affected page will have the script executed in their browser. The impact includes potential session hijacking, data theft, or defacement of the site by an attacker. Both the type of weakness and the attack scenario are consistent with CWE-79 and CWE-94 as documented.", "risk_and_exploitability": "The CVSS score of 4.8 indicates moderate risk, although the EPSS score of less than 1% reflects a very low probability of exploitation in the wild. The flaw is not listed in the CISA KEV catalog, suggesting it has not been widely abused. Nonetheless, because the vulnerability is exploitable remotely and results in cross site scripting, it remains a relevant concern for sites that use the Guestbook Plugin and can grant attackers control over user sessions or site content."}}}}, "created": "2026-04-27T18:41:59.098848+00:00", "updated": "2026-04-28T05:30:23.359056+00:00", "vendors": ["maxsite", "maxsite$PRODUCT$cms"]}