CVE-2021-38509

MediumCVSS 4.3/10Last modified Jun 17, 2026

Description

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.

Metrics

CVSS 3.1 4.3/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Weakness enumeration

CWE-1021

Affected software

No affected versions have been published.

Timeline

Published
Dec 8, 2021
Last modified
Jun 17, 2026
NVD status
Modified

Related CVEs from 2021

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