CVE-2026-52841

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{"affected": [{"affectedData": [{"product": "easyappointments", "vendor": "alextselegidis", "versions": [{"status": "affected", "version": "< 1.6.0"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Easy!Appointments is a self hosted appointment scheduler. In versions prior to 1.6.0, `Google::oauth` at `application/controllers/Google.php:278` stores its URL-supplied `provider_id` in the session, and `oauth_callback` saves the issued Google OAuth token against that row without checking the caller owns the provider. Any logged-in backend user (admin, provider, or secretary) rebinds a peer provider's Google sync to a Google account they control. The peer's appointments then sync into the attacker's calendar with each customer's name and email attached as attendee data. Version 1.6.0 patches the issue."}, {"lang": "es", "value": "Easy!Appointments es un programador de citas autoalojado. En versiones anteriores a la 1.6.0, Google::oauth en application/controllers/Google.php:278 almacena su provider_id suministrado por URL en la sesi\u00f3n, y oauth_callback guarda el token de Google OAuth emitido contra esa fila sin verificar que el llamador posee el proveedor. Cualquier usuario de backend con sesi\u00f3n iniciada (administrador, proveedor o secretario) reasigna la sincronizaci\u00f3n de Google de un proveedor par a una cuenta de Google que controlan. Las citas del par luego se sincronizan en el calendario del atacante con el nombre y correo electr\u00f3nico de cada cliente adjuntos como datos de asistente. La versi\u00f3n 1.6.0 corrige el problema."}], "id": "CVE-2026-52841", "lastModified": "2026-10-24T21:10:00.130", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 3.1, "baseSeverity": "LOW", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 0.5, "impactScore": 2.5, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-52841", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-07-14T15:45:35.488362Z", "version": "2.0.3"}}]}, "published": "2026-07-14T16:17:00.800", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/alextselegidis/easyappointments/commit/4b2d245d2cd2058dc76e05f6eb65b26699268471"}, {"source": "security-advisories@github.com", "url": "https://github.com/alextselegidis/easyappointments/security/advisories/GHSA-8hm4-r66f-29wr"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/alextselegidis/easyappointments/security/advisories/GHSA-8hm4-r66f-29wr"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-639"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.6.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "easyappointments", "source": "cna", "vendor": "alextselegidis"}, "product": "easyappointments", "vendor": "alextselegidis"}], "created": "2026-07-14T16:45:04.161826+00:00", "updated": "2026-07-31T10:15:06.118439+00:00", "vendors": ["alextselegidis", "alextselegidis$PRODUCT$easyappointments"]}