VDB
DEBIAN-CVE-2021-38503
DEBIAN-CVE-2021-38503
PUBLISHED
CVSS 10 CRITICAL
The iframe sandbox rules were not correctly applied to XSLT stylesheets, allowing an iframe to bypass restrictions such as executing scripts or navigating the top-level frame. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.
Risk Scores
CVSS 3.1
10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:13 | thunderbird | 0, 0, 0 |
| Debian:12 | thunderbird | 0, 0, 0 |
| Debian:11 | firefox-esr | *, 91.4.0esr-1, 91.4.1esr-1~deb9u1 |
| Debian:13 | firefox-esr | 0, 0, 0 |
| Debian:14 | firefox-esr | 0, 0, 0 |
| Debian:11 | thunderbird | 1:91.1.0-1, 1:91.1.1-1, 1:91.2.0-1 |
| Debian:12 | firefox-esr | 0, 0, 0 |
| Debian:14 | thunderbird | 0, 0, 0 |
Exploit Intelligence
- cve_test.go (github-poc)
- cve_test.go (github-poc)
Timeline
- Dec 8, 2021 CVE Published
- Apr 28, 2026 CVE Updated