By tricking the browser with a `X-Frame-Options` header, a sandboxed iframe could have presented a button that, if clicked by a user, would bypass restrictions to open a new window. This vulnerability affects Firefox < 127, Firefox ESR < 115.12, and Thunderbird < 115.12.
Al engañar al navegador con un encabezado `X-Frame-Options`, un iframe en espacio aislado podría haber presentado un botón que, si un usuario hiciera clic en él, evitaría las restricciones para abrir una nueva ventana. Esta vulnerabilidad afecta a Firefox < 127 y Firefox ESR < 115.12.
The Mozilla Foundation Security Advisory describes this flaw as:
By tricking the browser with a `X-Frame-Options` header, a sandboxed iframe could have presented a button that, if clicked by a user, would bypass restrictions to open a new window.
