CVE-2021-4431

Name: CVE-2021-4431
Creator: NVD / NIST
Published: 2023-11-07T11:15:10.07+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.63%

Last modified Jun 17, 2026

CVE-2021-4431 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. A vulnerability classified as problematic has been found in msyk FMDataAPI up to 22. Affected is an unknown function of the file FMDataAPI_Sample.php. EPSS estimates a 0.63% chance of exploitation in the next 30 days.

Description

A vulnerability classified as problematic has been found in msyk FMDataAPI up to 22. Affected is an unknown function of the file FMDataAPI_Sample.php. The manipulation leads to cross site scripting. It is possible to launch the attack remotely. Upgrading to version 23 is able to address this issue. The patch is identified as 3bd1709a8f7b1720529bf5dfc9855ad609f436cf. It is recommended to upgrade the affected component. VDB-244494 is the identifier assigned to this vulnerability.

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

0.63%

45.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Msyk	Fmdataapi	<= 22

References

https://github.com/msyk/FMDataAPI/commit/3bd1709a8f7b1720529bf5dfc9855ad609f436cfPatch
https://github.com/msyk/FMDataAPI/pull/54Patch, Vendor Advisory
https://github.com/msyk/FMDataAPI/releases/tag/23Release Notes
https://vuldb.com/?ctiid.244494Permissions Required, Third Party Advisory, VDB Entry
https://vuldb.com/?id.244494Permissions Required, Third Party Advisory, VDB Entry
https://github.com/msyk/FMDataAPI/commit/3bd1709a8f7b1720529bf5dfc9855ad609f436cfPatch
https://github.com/msyk/FMDataAPI/pull/54Patch, Vendor Advisory
https://github.com/msyk/FMDataAPI/releases/tag/23Release Notes
https://vuldb.com/?ctiid.244494Permissions Required, Third Party Advisory, VDB Entry
https://vuldb.com/?id.244494Permissions Required, Third Party Advisory, VDB Entry

Timeline

Published: Nov 7, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-4431?

How severe is CVE-2021-4431?

CVE-2021-4431 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.63% probability of exploitation in the next 30 days.

How do I fix CVE-2021-4431?

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-2021-4431?

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

Scan your code now

Source: NVD / NIST