CVE-2021-41917

Name: CVE-2021-41917
Creator: NVD / NIST
Published: 2021-10-08T16:15:08.25+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.55%

Last modified Jun 17, 2026

CVE-2021-41917 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. webTareas version 2.4 and earlier allows an authenticated user to store arbitrary web script or HTML by creating or editing a client name in the clients section, due to incorrect sanitization of user-supplied data and achieve a Stored Cross-Site Scripting attack against the platform users and administrators. The affected endpoint is /clients/editclient.php, on the HTTP POST cn parameter.. EPSS estimates a 0.55% chance of exploitation in the next 30 days.

Description

webTareas version 2.4 and earlier allows an authenticated user to store arbitrary web script or HTML by creating or editing a client name in the clients section, due to incorrect sanitization of user-supplied data and achieve a Stored Cross-Site Scripting attack against the platform users and administrators. The affected endpoint is /clients/editclient.php, on the HTTP POST cn parameter.

Metrics

CVSS 3.1

5.4/10

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

EPSS Probability

0.55%

41.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Webtareas Project	Webtareas	<= 2.4

References

https://n4nj0.github.io/advisories/webtareas-multiple-vulnerabilities-i/Exploit, Third Party Advisory
https://n4nj0.github.io/advisories/webtareas-multiple-vulnerabilities-i/Exploit, Third Party Advisory

Timeline

Published: Oct 8, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-41917?

How severe is CVE-2021-41917?

CVE-2021-41917 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.55% probability of exploitation in the next 30 days.

How do I fix CVE-2021-41917?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-41917?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST