CVE-2026-71555

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{"affected": [{"affectedData": [{"product": "PILOS", "vendor": "THM-Health", "versions": [{"status": "affected", "version": ">= 2.1.0, < 4.14.1"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "PILOS (Platform for Interactive Live-Online Seminars) is a frontend for BigBlueButton. From 2.1.0 until 4.14.1, PILOS does not send a Cross-Origin-Opener-Policy response header, so pages opened by PILOS via a link that opens a new browsing context (e.g., target=\"_blank\") retain a window.opener reference back to the originating PILOS tab. A malicious destination page reached this way can use window.opener to navigate or manipulate the original PILOS tab, a technique known as reverse tabnabbing, potentially redirecting an authenticated user to a phishing page that mimics PILOS. This issue is fixed in version 4.14.1."}, {"lang": "es", "value": "PILOS (Plataforma para Seminarios Interactivos en Vivo y en L\u00ednea) es un frontend para BigBlueButton. Desde la versi\u00f3n 2.1.0 hasta la 4.14.1, PILOS no env\u00eda una cabecera de respuesta Cross-Origin-Opener-Policy, por lo que las p\u00e1ginas abiertas por PILOS a trav\u00e9s de un enlace que abre un nuevo contexto de navegaci\u00f3n (por ejemplo, target=\u2019_blank\u2019) retienen una referencia window.opener de vuelta a la pesta\u00f1a PILOS de origen. Una p\u00e1gina de destino maliciosa alcanzada de esta manera puede usar window.opener para navegar o manipular la pesta\u00f1a PILOS original, una t\u00e9cnica conocida como reverse tabnabbing, redirigiendo potencialmente a un usuario autenticado a una p\u00e1gina de phishing que imita a PILOS. Este problema est\u00e1 solucionado en la versi\u00f3n 4.14.1."}], "id": "CVE-2026-71555", "lastModified": "2026-10-24T15:10:00.190", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.1, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.3, "impactScore": 1.4, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-71555", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-08-07T17:25:46.465635Z", "version": "2.0.3"}}]}, "published": "2026-08-06T22:18:32.553", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/THM-Health/PILOS/commit/b50f2bd07c4f4a7d6a9981578238ae3579275d81"}, {"source": "security-advisories@github.com", "url": "https://github.com/THM-Health/PILOS/releases/tag/v4.14.1"}, {"source": "security-advisories@github.com", "url": "https://github.com/THM-Health/PILOS/security/advisories/GHSA-j4wr-p8gh-xrw5"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-1022"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2.1.0,4.14.1)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "PILOS", "source": "cna", "vendor": "THM-Health"}, "product": "pilos", "vendor": "thm-health"}], "created": "2026-08-07T00:45:04.368441+00:00", "updated": "2026-08-07T09:58:40.033668+00:00", "vendors": ["thm-health", "thm-health$PRODUCT$pilos"]}