CVE-2021-37524

Name: CVE-2021-37524
Creator: NVD / NIST
Published: 2022-07-01T18:15:08.467+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.65%

Last modified Jun 17, 2026

CVE-2021-37524 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. Cross Site Scripting (XSS) vulnerability in FusionPBX 4.5.26 allows remote unauthenticated users to inject arbitrary web script or HTML via an unsanitized "path" parameter in resources/login.php.. EPSS estimates a 0.65% chance of exploitation in the next 30 days.

Description

Cross Site Scripting (XSS) vulnerability in FusionPBX 4.5.26 allows remote unauthenticated users to inject arbitrary web script or HTML via an unsanitized "path" parameter in resources/login.php.

Metrics

CVSS 3.1

6.1/10

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

EPSS Probability

0.65%

46.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Fusionpbx	Fusionpbx	< 5.0.1

References

https://github.com/fusionpbx/fusionpbx/commit/c3b811393de63e324eaa64fe5c9ea3fce428fe1aPatch, Third Party Advisory
https://www.fusionpbx.com/app/tickets/ticket_edit.php?id=4a0666cd-8c12-46ae-bc0a-02f007b62cdbPermissions Required, Vendor Advisory
https://github.com/fusionpbx/fusionpbx/commit/c3b811393de63e324eaa64fe5c9ea3fce428fe1aPatch, Third Party Advisory
https://www.fusionpbx.com/app/tickets/ticket_edit.php?id=4a0666cd-8c12-46ae-bc0a-02f007b62cdbPermissions Required, Vendor Advisory

Timeline

Published: Jul 1, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-37524?

Cross Site Scripting (XSS) vulnerability in FusionPBX 4.5.26 allows remote unauthenticated users to inject arbitrary web script or HTML via an unsanitized "path" parameter in resources/login.php.

How severe is CVE-2021-37524?

CVE-2021-37524 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.65% probability of exploitation in the next 30 days.

How do I fix CVE-2021-37524?

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-2021-37524?

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

Scan your code now

Source: NVD / NIST