Vulnerability Monitor

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CVE-2021-39222

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.

Published

2021-11-15T19:15:07.297

Last Modified

2024-11-21T06:18:56.530

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 6.4 (MEDIUM)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:N/I:P/A:N

  • Access Vector: NETWORK
  • Access Complexity: MEDIUM
  • Authentication: NONE
  • Confidentiality Impact: NONE
  • Integrity Impact: PARTIAL
  • Availability Impact: NONE
Exploitability Score

8.6

Impact Score

2.9

Weaknesses
  • Type: Secondary
    CWE-79
    CWE-434
  • Type: Primary
    CWE-79
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application nextcloud talk < 10.0.7 Yes
Application nextcloud talk < 10.1.4 Yes
Application nextcloud talk < 11.1.2 Yes
References