{"id":"CVE-2025-62366","sourceIdentifier":"security-advisories@github.com","published":"2025-10-14T16:15:42.170","lastModified":"2026-10-08T11:10:00.250","vulnStatus":"Deferred","cveTags":[],"descriptions":[{"lang":"en","value":"mailgen is a Node.js package that generates responsive HTML e-mails for sending transactional mail. Mailgen versions through 2.0.30 contain an HTML injection vulnerability in plaintext emails produced by the generatePlaintext method when user‑generated content is supplied. The function attempts to remove HTML tags, but if tags are provided as encoded HTML entities they are not removed and are later decoded, resulting in active HTML (for example an img tag with an event handler) in the supposed plaintext output. In contexts where the generated plaintext string is subsequently rendered as HTML, this can allow execution of attacker‑controlled JavaScript. Versions 2.0.31 and later contain a fix. No known workarounds exist."},{"lang":"es","value":"mailgen es un paquete de Node.js que genera correos electrónicos HTML adaptables para el envío de correo transaccional. Las versiones de Mailgen hasta la 2.0.30 contienen una vulnerabilidad de inyección HTML en los correos electrónicos de texto plano producidos por el método generatePlaintext cuando se proporciona contenido generado por el usuario. La función intenta eliminar etiquetas HTML, pero si las etiquetas se proporcionan como entidades HTML codificadas, no se eliminan y se decodifican posteriormente, lo que resulta en HTML activo (por ejemplo, una etiqueta img con un gestor de eventos) en la supuesta salida de texto plano. En contextos donde la cadena de texto plano generada se renderiza posteriormente como HTML, esto puede permitir la ejecución de JavaScript controlado por el atacante. Las versiones 2.0.31 y posteriores contienen una corrección. No existen soluciones alternativas conocidas."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"eladnava","product":"mailgen","versions":[{"version":"< 2.0.31","status":"affected"}]}]}],"metrics":{"cvssMetricV40":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/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","baseScore":2.9,"baseSeverity":"LOW","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"LOW","subIntegrityImpact":"LOW","subAvailabilityImpact":"NONE","exploitMaturity":"PROOF_OF_CONCEPT","confidentialityRequirement":"NOT_DEFINED","integrityRequirement":"NOT_DEFINED","availabilityRequirement":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED"}}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2025-10-14T16:07:32.176853Z","id":"CVE-2025-62366","options":[{"exploitation":"poc"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-79"}]}],"references":[{"url":"https://github.com/eladnava/mailgen/commit/7279a983481d05c51aa451e86146f98aaa42fee9","source":"security-advisories@github.com"},{"url":"https://github.com/eladnava/mailgen/security/advisories/GHSA-xw6r-chmh-vpmj","source":"security-advisories@github.com"}]}