{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "2.1.0"
              },
              {
                "fixed": "4.14.1"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "158beb6e1fa6b214e97a8a76da3a29cfaac40e1f"
            },
            {
              "fixed": "b50f2bd07c4f4a7d6a9981578238ae3579275d81"
            },
            {
              "fixed": "82791a0e73f47733897dfcf01d5a9b866889bb83"
            }
          ],
          "repo": "https://github.com/thm-health/pilos",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-j4wr-p8gh-xrw5"
  ],
  "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"
  },
  "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.",
  "id": "CVE-2026-71555",
  "modified": "2026-08-08T03:30:14.626587363Z",
  "published": "2026-08-06T21:51:55.890Z",
  "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"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "PILOS: Reverse tabnabbing in room description"
}