CLEANSTART-2024-ZR42121

    Dashboard / Vulnerabilities / CLEANSTART-2024-ZR42121

    CLEANSTART-2024-ZR42121

    Published: 31 Oct 2026Last Modified: 31 Oct 2026
    Upstream:
    CVE-2021-38503

    Summary: 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

    Details: CVE-2021-38503 affects multiple packages. 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. See references for individual vulnerability details.

    References: https://github.com/cleanstart-dev/cleanstart-security-advisories/tree/main/advisories/2024/CLEANSTART-2024-ZR42121.json, https://osv.dev/vulnerability/CVE-2021-38503, https://nvd.nist.gov/vuln/detail/CVE-2021-38503

    Affected packages

    Package

    Name: thunderbird

    Purl: pkg:apk/cleanstart/thunderbird

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -91.3.2-r0

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CLEANSTART-2024-ZR42121 | CVE-DB