View at Official alpine advisory, NVD, CVE.org · CVE detail
Freshness: no update timestamp found; verify against the upstream OS advisory manually.
CVE-2021-38503: 4 source package rows (firefox, firefox-esr, librewolf, thunderbird); 95 state rows across 7 repos (3.17-community, 3.18-community, 3.19-community, 3.20-community, 3.21-community, 3.22-community, edge-community); fixed 28, open 67.
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.