CVE-2021-39222

XSS in Talk

State: Published
Severity: 6.4 Medium
Published: Nov 15, 2021
Updated: Aug 4, 2024
Reserved: Aug 16, 2021

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	6.4 Medium	CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N	GitHub_M

Weaknesses

CWE-434 Unrestricted Upload of File with Dangerous Type
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected Products

Product	Versions
security-advisoriesnextcloud	< 10.0.7Affected >= 10.1.0, < 10.1.4Affected >= 11.1.0, < 11.1.2Affected < 11.2.0Affected >= 12.0.0.alpha-1, < 12.0.0Affected

References

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