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.

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-2863-1 firefox-esr security update
Debian DLA Debian DLA DLA-2874-1 thunderbird security update
Debian DSA Debian DSA DSA-5026-1 firefox-esr security update
Debian DSA Debian DSA DSA-5034-1 thunderbird security update
EUVD EUVD EUVD-2021-24961 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.
Ubuntu USN Ubuntu USN USN-5131-1 Firefox vulnerabilities
Ubuntu USN Ubuntu USN USN-5152-1 Thunderbird vulnerabilities
Ubuntu USN Ubuntu USN USN-5248-1 Thunderbird vulnerabilities
Fixes

Solution

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Workaround

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cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

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

cve-icon OpenCVE Enrichment

No data.

Weaknesses