CVE-2021-38508

By displaying a form validity message in the correct location at the same time as a permission prompt (such as for geolocation), the validity message could have obscured the prompt, resulting in the user potentially being tricked into granting the permission. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.

• CWE-1021

• https://bugzilla.mozilla.org/show_bug.cgi?id=1366818Issue Tracking, Permissions Required, Vendor Advisory
• https://lists.debian.org/debian-lts-announce/2021/12/msg00030.htmlMailing List, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2022/01/msg00001.htmlMailing List, Third Party Advisory
• https://security.gentoo.org/glsa/202202-03Third Party Advisory
• https://security.gentoo.org/glsa/202208-14Third Party Advisory
• https://www.debian.org/security/2021/dsa-5026Third Party Advisory
• https://www.debian.org/security/2022/dsa-5034Third Party Advisory
• https://www.mozilla.org/security/advisories/mfsa2021-48/Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2021-49/Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2021-50/Vendor Advisory
• https://bugzilla.mozilla.org/show_bug.cgi?id=1366818Issue Tracking, Permissions Required, Vendor Advisory
• https://lists.debian.org/debian-lts-announce/2021/12/msg00030.htmlMailing List, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2022/01/msg00001.htmlMailing List, Third Party Advisory
• https://security.gentoo.org/glsa/202202-03Third Party Advisory
• https://security.gentoo.org/glsa/202208-14Third Party Advisory
• https://www.debian.org/security/2021/dsa-5026Third Party Advisory
• https://www.debian.org/security/2022/dsa-5034Third Party Advisory
• https://www.mozilla.org/security/advisories/mfsa2021-48/Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2021-49/Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2021-50/Vendor Advisory

Published

Dec 8, 2021

Last Modified

Jun 17, 2026

Status

Modified

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