CVE-2021-39221
Nextcloud Contacts Persistent XSS Vulnerability
Description
Nextcloud is an open-source, self-hosted productivity platform. The Nextcloud Contacts application prior to version 4.0.3 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 Contacts application is upgraded to 4.0.3. As a workaround, one may use a browser that has support for Content-Security-Policy.
INFO
Published Date :
Oct. 25, 2021, 7:15 p.m.
Last Modified :
Nov. 21, 2024, 6:18 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.2
Exploitability Score :
1.2
Affected Products
The following products are affected by CVE-2021-39221
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-39221.
| URL | Resource |
|---|---|
| https://github.com/nextcloud/contacts/pull/2407 | Third Party Advisory |
| https://github.com/nextcloud/security-advisories/security/advisories/GHSA-j6cx-mxqf-f9vc | Third Party Advisory |
| https://github.com/nextcloud/contacts/pull/2407 | Third Party Advisory |
| https://github.com/nextcloud/security-advisories/security/advisories/GHSA-j6cx-mxqf-f9vc | Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-39221 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-39221 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://github.com/nextcloud/contacts/pull/2407 Added Reference https://github.com/nextcloud/security-advisories/security/advisories/GHSA-j6cx-mxqf-f9vc -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Oct. 27, 2021
Action Type Old Value New Value Added CVSS V2 Metadata Victim must voluntarily interact with attack mechanism Added CVSS V2 NIST (AV:N/AC:M/Au:S/C:N/I:P/A:N) Added CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Changed Reference Type https://github.com/nextcloud/contacts/pull/2407 No Types Assigned https://github.com/nextcloud/contacts/pull/2407 Third Party Advisory Changed Reference Type https://github.com/nextcloud/security-advisories/security/advisories/GHSA-j6cx-mxqf-f9vc No Types Assigned https://github.com/nextcloud/security-advisories/security/advisories/GHSA-j6cx-mxqf-f9vc Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:nextcloud:contacts:*:*:*:*:*:*:*:* versions up to (excluding) 4.0.3
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-39221 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-39221
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.05 }} 0.00%
score
0.16973
percentile