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CVE-2021-39222

MEDIUM

6.4

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.

CVE Details

CVSS v3.1 Score6.4

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N

Attack VectorNETWORK

ComplexityHIGH

Privileges RequiredLOW

User InteractionREQUIRED

Published11/15/2021

Last Modified11/21/2024

Sourcenvd

Honeypot Sightings0

Affected Products

nextcloud:talk

Weaknesses (CWE)

CWE-79CWE-434CWE-79

References

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-xhxq-f4vg-jw5g(security-advisories@github.com)

https://github.com/nextcloud/spreed/pull/542(security-advisories@github.com)

https://hackerone.com/reports/1135481(security-advisories@github.com)

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-xhxq-f4vg-jw5g(af854a3a-2127-422b-91ae-364da2661108)

https://github.com/nextcloud/spreed/pull/542(af854a3a-2127-422b-91ae-364da2661108)

https://hackerone.com/reports/1135481(af854a3a-2127-422b-91ae-364da2661108)

IOC Correlations

No correlations recorded

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