{"id":"CVE-2026-71555","summary":"PILOS: Reverse tabnabbing in room description","details":"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.","aliases":["GHSA-j4wr-p8gh-xrw5"],"modified":"2026-08-08T03:32:25.063084944Z","published":"2026-08-06T21:51:55.890Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-1022"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71555.json"},"references":[{"type":"WEB","url":"https://github.com/THM-Health/PILOS/releases/tag/v4.14.1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71555.json"},{"type":"ADVISORY","url":"https://github.com/THM-Health/PILOS/security/advisories/GHSA-j4wr-p8gh-xrw5"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-71555"},{"type":"FIX","url":"https://github.com/THM-Health/PILOS/commit/b50f2bd07c4f4a7d6a9981578238ae3579275d81"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/thm-health/pilos","events":[{"introduced":"158beb6e1fa6b214e97a8a76da3a29cfaac40e1f"},{"fixed":"b50f2bd07c4f4a7d6a9981578238ae3579275d81"},{"fixed":"82791a0e73f47733897dfcf01d5a9b866889bb83"}],"database_specific":{"source":["AFFECTED_FIELD","REFERENCES"],"extracted_events":[{"introduced":"2.1.0"},{"fixed":"4.14.1"}]}}],"versions":["v4.14.0","v4.13.0","v4.12.0","v4.11.0","v4.10.0","v4.9.0","v4.8.0","v4.7.1","v4.7.0","v4.6.1","v4.6.0","v4.5.0","v4.4.0","v4.3.1","v4.3.0","v4.2.0","v4.1.2","v4.1.1","v4.1.0","v4.0.0","v3.0.3","v4.0.0-RC.4","v4.0.0-RC.3","v4.0.0-RC.2","v4.0.0-RC.1","v4.0.0-beta.2","v4.0.0-beta.1","v3.0.2","v3.0.1","v3.0.0","v2.4.0","v2.3.4","v2.3.3","v2.3.2","v2.3.1","v2.3.0","v2.1.1","v2.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-71555.json"}}],"schema_version":"1.8.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:N"}]}