CVE-2021-42943

Name: CVE-2021-42943
Creator: NVD / NIST
Published: 2022-05-17T11:15:07.727+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.70%

Last modified Jun 17, 2026

CVE-2021-42943 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. Stored cross-site scripting (XSS) in admin/usermanager.php over IPPlan v4.92b allows remote attackers to inject arbitrary web script or HTML via the userid parameter.. EPSS estimates a 0.70% chance of exploitation in the next 30 days.

Description

Stored cross-site scripting (XSS) in admin/usermanager.php over IPPlan v4.92b allows remote attackers to inject arbitrary web script or HTML via the userid 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

0.70%

48.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Ipplan Project	Ipplan	4.92b

References

https://devbrain.com.br/index.php/2022/05/16/cve-2021-42943/Exploit, Third Party Advisory
https://devbrain.com.br/index.php/2022/05/16/cve-2021-42943/Exploit, Third Party Advisory

Timeline

Published: May 17, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-42943?

Stored cross-site scripting (XSS) in admin/usermanager.php over IPPlan v4.92b allows remote attackers to inject arbitrary web script or HTML via the userid parameter.

How severe is CVE-2021-42943?

CVE-2021-42943 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.70% probability of exploitation in the next 30 days.

How do I fix CVE-2021-42943?

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-2021-42943?

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

Scan your code now

Source: NVD / NIST