{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-71555", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-08-06T21:24:15.376Z", "datePublished": "2026-08-06T21:51:55.890Z", "dateUpdated": "2026-08-06T21:51:55.890Z"}, "containers": {"cna": {"title": "PILOS: Reverse tabnabbing in room description", "problemTypes": [{"descriptions": [{"cweId": "CWE-1022", "lang": "en", "description": "CWE-1022: Use of Web Link to Untrusted Target with window.opener Access", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"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"}}], "references": [{"name": "https://github.com/THM-Health/PILOS/security/advisories/GHSA-j4wr-p8gh-xrw5", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/THM-Health/PILOS/security/advisories/GHSA-j4wr-p8gh-xrw5"}, {"name": "https://github.com/THM-Health/PILOS/commit/b50f2bd07c4f4a7d6a9981578238ae3579275d81", "tags": ["x_refsource_MISC"], "url": "https://github.com/THM-Health/PILOS/commit/b50f2bd07c4f4a7d6a9981578238ae3579275d81"}, {"name": "https://github.com/THM-Health/PILOS/releases/tag/v4.14.1", "tags": ["x_refsource_MISC"], "url": "https://github.com/THM-Health/PILOS/releases/tag/v4.14.1"}], "affected": [{"vendor": "THM-Health", "product": "PILOS", "versions": [{"version": ">= 2.1.0, < 4.14.1", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-08-06T21:51:55.890Z"}, "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."}], "source": {"advisory": "GHSA-j4wr-p8gh-xrw5", "discovery": "UNKNOWN"}}}}

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