CVE-2021-38497

MEDIUM

Firefox < 93, Thunderbird < 91.2, Firefox ESR < 91.2 - CSRF

Title source: llm

Description

Through use of reportValidity() and window.open(), a plain-text validation message could have been overlaid on another origin, leading to possible user confusion and spoofing attacks. This vulnerability affects Firefox < 93, Thunderbird < 91.2, and Firefox ESR < 91.2.

References (4)

[Permissions Required, Vendor Advisory] https://bugzilla.mozilla.org/show_bug.cgi?id=1726621

[Vendor Advisory] https://www.mozilla.org/security/advisories/mfsa2021-43/

[Vendor Advisory] https://www.mozilla.org/security/advisories/mfsa2021-45/

[Vendor Advisory] https://www.mozilla.org/security/advisories/mfsa2021-47/

Scores

CVSS v3 6.5

EPSS 0.0020

EPSS Percentile 41.7%

Attack Vector NETWORK

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

Classification

CWE

CWE-346

Status published

Affected Products (3)

mozilla/firefox < 93.0

mozilla/firefox_esr < 91.2

mozilla/thunderbird < 91.2

Timeline

Published Nov 03, 2021

Tracked Since Feb 18, 2026