Due to an unusual sequence of attacker-controlled events, a Javascript alert() dialog with arbitrary (although unstyled) contents could be displayed over top an uncontrolled webpage of the attacker's choosing. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published: 2021-12-08T21:21:30

Updated: 2024-08-04T01:44:23.355Z

Reserved: 2021-08-10T00:00:00

Link: CVE-2021-38509

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2021-12-08T22:15:09.050

Modified: 2024-11-21T06:17:16.783

Link: CVE-2021-38509

cve-icon Redhat

Severity : Moderate

Publid Date: 2021-11-02T00:00:00Z

Links: CVE-2021-38509 - Bugzilla