CVE-2026-22875

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If crafted input is stored by an attacker, arbitrary script may be executed on a logged-in user's web browser. Note that Movable Type 7 series and 8.4 series, which are End-of-Life (EOL), are affected by the vulnerability as well."}, {"lang": "es", "value": "Movable Type contiene una vulnerabilidad de cross-site scripting almacenado en Export Sites. Si una entrada manipulada es almacenada por un atacante, se puede ejecutar script arbitrario en el navegador web de un usuario que ha iniciado sesi\u00f3n. Tenga en cuenta que las series Movable Type 7 y 8.4, que est\u00e1n al final de su vida \u00fatil (EOL), tambi\u00e9n se ven afectadas por la vulnerabilidad."}], "id": "CVE-2026-22875", "lastModified": "2026-06-17T10:20:32.810", "metrics": {"cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "version": "3.0"}, "exploitabilityScore": 2.3, "impactScore": 2.7, "source": "vultures@jpcert.or.jp", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 4.8, "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": "LOW", "subIntegrityImpact": "LOW", "userInteraction": "ACTIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/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": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "vultures@jpcert.or.jp", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-22875", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-02-04T16:07:52.134565Z", "version": "2.0.3"}}]}, "published": "2026-02-04T07:16:01.213", "references": [{"source": "vultures@jpcert.or.jp", "url": "https://jvn.jp/en/jp/JVN45405689/"}, {"source": "vultures@jpcert.or.jp", "url": "https://movabletype.org/news/2026/02/mt-906-released.html"}, {"source": "vultures@jpcert.or.jp", "url": "https://www.sixapart.jp/movabletype/news/2026/02/04-1100.html"}], "sourceIdentifier": "vultures@jpcert.or.jp", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "vultures@jpcert.or.jp", "type": "Secondary"}]}

{}

{"analysis": {"en": {"generated_at": "2026-04-18T14:04:26.963245+00:00", "value": {"mitigation_remediation": ["Apply a vendor\u2011issued patch or upgrade to a fixed version of Movable\u202fType, as provided by Six\u202fApart in their advisories.", "If upgrading is not immediately possible, restrict the Export\u202fSites feature to trusted administrators and apply input validation to sanitize any user\u2011supplied text before storage.", "Continuously monitor the application for XSS attempts, and consider disabling the Export\u202fSites function if it is not needed for business operations."], "summary": {"action": "Upgrade", "impact": "Stored XSS leading to arbitrary script execution on logged\u2011in users\u2019 browsers"}, "threat_synthesis": {"affected_systems": "The affected products are Six\u202fApart\u2019s Movable\u202fType editions: Cloud Edition, Software Edition, Advanced, Premium (Advanced Edition), Premium (Cloud Edition), and Premium (Software Edition). Versions 7.x and 8.4.x, which are end\u2011of\u2011life, also are susceptible. Specific version numbers are not listed in the available data.", "description_and_impact": "Movable\u202fType contains a stored cross\u2011site scripting flaw in the Export Sites feature. If an attacker supplies crafted data that is stored by the system, the malicious script will run whenever a logged\u2011in user views the exported content. The known weakness is identified as CWE\u201179, which permits attackers to inject client\u2011side code that compromises confidentiality and integrity of the victim\u2019s browser session.", "risk_and_exploitability": "The CVSS score of 4.8 indicates a moderate severity. Exploitation probability, per EPSS, is less than 1\u202f%, suggesting a low likelihood of widespread attacks. The issue is not present in CISA\u2019s Known Exploited Vulnerabilities catalog. Based on the description, the likely attack vector is through the web interface that handles Export Sites, where an attacker must create or modify content that is later rendered to other users\u2019 browsers. No public exploitation has been reported, and the exploitation conditions require authorized access to the export functionality or the ability to inject content that is subsequently displayed."}}}}, "created": "2026-02-04T21:18:10.777533+00:00", "title": "Stored Cross\u2011Site Scripting in Export Sites", "updated": "2026-04-18T14:15:04.117941+00:00", "vendors": ["six_apart", "six_apart$PRODUCT$movable_type", "six_apart_ltd", "six_apart_ltd$PRODUCT$movable_type"]}