CVE-2021-43817

    Dashboard / Vulnerabilities / CVE-2021-43817

    CVE-2021-43817

    Published: 13 Dec 2021Last Modified: 7 Aug 2026

    Summary:

    Details: Collabora Online is a collaborative online office suite based on LibreOffice technology. In affected versions a reflected XSS vulnerability was found in Collabora Online. An attacker could inject unescaped HTML into a variable as they created the Collabora Online iframe, and execute scripts inside the context of the Collabora Online iframe. This would give access to a small set of user settings stored in the browser, as well as the session's authentication token which was also passed in at iframe creation time. Users should upgrade to Collabora Online 6.4.16 or higher or Collabora Online 4.2.20 or higher. Collabora Online Development Edition 21.11 is not affected.

    References: https://github.com/CollaboraOnline/online/security/advisories/GHSA-7f6h-v9mx-58q9

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -dc568ccaee0f1e68fa1a7f477e936e5be5d6291b

    Affected versions

    cp-4.2.19-1
    cp-4.2.18-1
    cp-4.2.16-1
    cp-4.2.15-1
    cp-4.2.14-1
    cp-4.2.13-1
    cp-4.2.12-2
    cp-4.2.12-1
    cp-4.2.11-1
    cp-4.2.9-1
    cp-4.2.4-2
    cp-4.2.4-1

    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
    CVE-2021-43817 | CVE-DB