CVE-2021-38503
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2021-38503
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-38503.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-38503
- Downstream
- Related
- Published
- 2021-12-08T22:15:08Z
- Modified
- 2025-08-09T19:01:26Z
- Severity
-
- 10.0 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
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.
- References
-
- https://bugzilla.mozilla.org/show_bug.cgi?id=1729517
- https://lists.debian.org/debian-lts-announce/2021/12/msg00030.html
- https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html
- https://security.gentoo.org/glsa/202202-03
- https://security.gentoo.org/glsa/202208-14
- https://www.debian.org/security/2021/dsa-5026
- https://www.debian.org/security/2022/dsa-5034
- https://www.mozilla.org/security/advisories/mfsa2021-48/
- https://www.mozilla.org/security/advisories/mfsa2021-49/
- https://www.mozilla.org/security/advisories/mfsa2021-50/