CVE-2021-34190

Name: CVE-2021-34190
Creator: NVD / NIST
Published: 2021-07-06T19:15:07.58+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.8/10EPSS 0.64%

Last modified Jun 17, 2026

CVE-2021-34190 is a medium-severity vulnerability rated 4.8/10 on the CVSS scale. A stored cross site scripting (XSS) vulnerability in index.php?menu=billing_rates of Issabel PBX version 4 allows attackers to execute arbitrary web scripts or HTML via a crafted payload entered into the "Name" or "Prefix" fields under the "Create New Rate" module.. EPSS estimates a 0.64% chance of exploitation in the next 30 days.

Description

A stored cross site scripting (XSS) vulnerability in index.php?menu=billing_rates of Issabel PBX version 4 allows attackers to execute arbitrary web scripts or HTML via a crafted payload entered into the "Name" or "Prefix" fields under the "Create New Rate" module.

Metrics

CVSS 3.1

4.8/10

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

EPSS Probability

0.64%

45.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Issabel	Pbx	4

References

https://research.0xdutra.com/posts/research-issabel-stored-xss/Exploit, Third Party Advisory
https://www.youtube.com/watch?v=apJH_D68lZIExploit, Third Party Advisory
https://research.0xdutra.com/posts/research-issabel-stored-xss/Exploit, Third Party Advisory
https://www.youtube.com/watch?v=apJH_D68lZIExploit, Third Party Advisory

Timeline

Published: Jul 6, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-34190?

How severe is CVE-2021-34190?

CVE-2021-34190 has a CVSS score of 4.8/10 (MEDIUM severity). The EPSS model estimates a 0.64% probability of exploitation in the next 30 days.

How do I fix CVE-2021-34190?

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-2021-34190?

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

Scan your code now

Source: NVD / NIST