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CVE-2021-39222

MEDIUM
Published 2021-11-15T18:30:13
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CVSS Score

V3.1
6.4
/10
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.004
probability
of exploitation in the wild

There is a 0.4% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.613
Higher than 61.3% of all CVEs

Attack Vector Metrics

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
REQUIRED
Scope
UNCHANGED

Impact Metrics

Confidentiality
HIGH
Integrity
HIGH
Availability
NONE

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.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

nextcloud

security-advisories

Affected Versions:

< 10.0.7 >= 10.1.0, < 10.1.4 >= 11.1.0, < 11.1.2 < 11.2.0 >= 12.0.0.alpha-1, < 12.0.0

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
Published: 2021-11-15T18:30:13
Last Modified: 2024-08-04T01:58:18.181Z
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