{"schema_version":"1.9.0","id":"GHSA-4952-p58q-6crx","published":"2021-08-23T19:40:22Z","modified":"2026-07-08T06:28:37.707191234Z","aliases":["BIT-jupyterlab-2021-32797","CVE-2021-32797","PYSEC-2021-130","PYSEC-2026-688"],"summary":"JupyterLab: XSS due to lack of sanitization of the action attribute of an html <form>","details":"### Impact\n\nUntrusted notebook can execute code on load. This is a remote code execution, but requires user action to open a notebook.\n\n### Patches\n\nPatched in the following versions: 3.1.4, 3.0.17, 2.3.2, 2.2.10, 1.2.21.\n\n### References\n\n[OWASP Page on Restricting Form Submissions](https://cheatsheetseries.owasp.org/cheatsheets/Content_Security_Policy_Cheat_Sheet.html)\n\n### For more information\n\nIf you have any questions or comments about this advisory, or vulnerabilities to report, please email our security list security@ipython.org.\n\nCredit: Guillaume Jeanne from 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