CVE-2021-39222

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    CVE-2021-39222

    Published: 15 Nov 2021Last Modified: 7 Aug 2026

    Summary:

    Details: Nextcloud is an open-source, self-hosted productivity platform. The Nextcloud Talk application was vulnerable to a stored Cross-Site Scripting (XSS) vulnerability. For exploitation, a user would need to right-click on a malicious file and open the file in a new tab. Due the strict Content-Security-Policy shipped with Nextcloud, this issue is not exploitable on modern browsers supporting Content-Security-Policy. It is recommended that the Nextcloud Talk application is upgraded to patched versions 10.0.7, 10.1.4, 11.1.2, 11.2.0 or 12.0.0. As a workaround, use a browser that has support for Content-Security-Policy.

    References: https://github.com/nextcloud/security-advisories/security/advisories/GHSA-xhxq-f4vg-jw5g, https://github.com/nextcloud/spreed/pull/542, https://hackerone.com/reports/1135481

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -dae087773399f4b704ba4b9f22f74e0c12ac96f4

    Affected versions

    v10.1.3
    v10.1.2
    v10.1.1
    v10.1.0

    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-2021-39222 | CVE-DB