UBUNTU-CVE-2020-6816

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    UBUNTU-CVE-2020-6816

    Published: 24 Mar 2020Last Modified: 9 Mar 2026
    Upstream:
    CVE-2020-6816
    Aliases:
    USN-8077-1

    Summary:

    Details: In Mozilla Bleach before 3.12, a mutation XSS in bleach.clean when RCDATA and either svg or math tags are whitelisted and the keyword argument strip=False.

    References: https://ubuntu.com/security/CVE-2020-6816, https://bugzilla.mozilla.org/show_bug.cgi?id=1621692, https://github.com/mozilla/bleach/security/advisories/GHSA-m6xf-fq7q-8743, https://github.com/mozilla/bleach/commit/175f67740e7951e1d80cefb7831e6c3e4efeb986, https://www.cve.org/CVERecord?id=CVE-2020-6816, https://ubuntu.com/security/notices/USN-8077-1

    Affected packages

    Package

    Name: python-bleach

    Purl: pkg:deb/ubuntu/[email protected]~esm1?arch=source&distro=esm-apps/xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1.4.2-1ubuntu0.1~esm1

    Affected versions

    1.4-1

    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
    UBUNTU-CVE-2020-6816 | CVE-DB