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)…

PriorityP426medium6.1CVSS 3.1

AVNACLPRNUIRSCCLILAN

EPSS

1.06%

60.5th percentile

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.

Affected

8 ranges

Vendor	Product	Version range	Fixed in
nextcloud	security-advisories	< 10.0.7	10.0.7
nextcloud	security-advisories	< 11.2.0	11.2.0
nextcloud	security-advisories	—	—
nextcloud	security-advisories	—	—
nextcloud	security-advisories	—	—
nextcloud	talk	< 10.0.7	10.0.7
nextcloud	talk	>= 10.1.0 < 10.1.4	10.1.4
nextcloud	talk	>= 11.0.0 < 11.1.2	11.1.2

CVSS provenance

nvdv3.16.1MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

nvdv2.04.3MEDIUMAV:N/AC:M/Au:N/C:N/I:P/A:N

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