CVEvulnerability
CVE-2021-38509
4.3 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2021-12-08
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 4.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
- CVSS 2.0 ([email protected])
- 4.3 MEDIUM — AV:N/AC:M/Au:N/C:N/I:P/A:N
- Weaknesses
- CWE-1021
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.
Affected configurations
• mozilla firefox (< 94.0)
• mozilla firefox esr (< 91.3.0)
• mozilla thunderbird (< 91.3.0)
• debian debian linux 9.0
• debian debian linux 10.0
• debian debian linux 11.0
Related
Weakness · CWE (1)
- CWE-1021 Improper Restriction of Rendered UI Layers or Frames weakness
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1718571 Issue Tracking, Permissions Required, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2021/12/msg00030.html Mailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html Mailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202202-03 Third Party Advisory
- https://security.gentoo.org/glsa/202208-14 Third Party Advisory
- https://www.debian.org/security/2021/dsa-5026 Third Party Advisory
- https://www.debian.org/security/2022/dsa-5034 Mailing List, Third 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=1718571 Issue Tracking, Permissions Required, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2021/12/msg00030.html Mailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html Mailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202202-03 Third Party Advisory
- https://security.gentoo.org/glsa/202208-14 Third Party Advisory
- https://www.debian.org/security/2021/dsa-5026 Third Party Advisory
- https://www.debian.org/security/2022/dsa-5034 Mailing List, Third 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