CVE-2021-38503 — Incorrect Authorization in Mozilla Firefox
Severity
10.0CRITICALNVD
OSV8.8
EPSS
1.1%
top 22.14%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedDec 8
Latest updateJan 21
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:HExploitability: 3.9 | Impact: 6.0
Affected Packages9 packages
Also affects: Debian Linux 10.0, 11.0, 9.0
🔴Vulnerability Details
5GHSA▶
GHSA-6g99-7xcp-vcw9: The iframe sandbox rules were not correctly applied to XSLT stylesheets, allowing an iframe to bypass restrictions such as executing scripts or naviga↗2021-12-09
OSV▶
CVE-2021-38503: The iframe sandbox rules were not correctly applied to XSLT stylesheets, allowing an iframe to bypass restrictions such as executing scripts or naviga↗2021-12-08
CVEList▶
CVE-2021-38503: The iframe sandbox rules were not correctly applied to XSLT stylesheets, allowing an iframe to bypass restrictions such as executing scripts or naviga↗2021-12-08
📋Vendor Advisories
8Debian▶
CVE-2021-38503: firefox - The iframe sandbox rules were not correctly applied to XSLT stylesheets, allowin...↗2021