CVE-2021-4431: A vulnerability classified as problematic has been found in msyk FMDataAPI up to 22

Q: How do I fix CVE-2021-4431?

fmdataapi: upgrade to newer than 22. Exact commands for each OS are on this page.

Q: Is CVE-2021-4431 being exploited?

CVE-2021-4431 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-4431 affect?

CVE-2021-4431 affects fmdataapi. Severity is low (CVSS 3.5). 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 remot

Q: How urgent is CVE-2021-4431?

Priority 25/100. No elevated risk signals yet.

Routine

LOW 3.5UPGRADE

CVE-2021-4431 is a low-severity flaw (CVSS 3.5) affecting fmdataapi. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	3.5 (Low)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.6% (top 50%)
CISA exploited list	No
Weakness	CWE-79
Published	2023-11-07
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: msyk

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-11-07 11:15 UTCPublished CVE record published
2026-06-17 04:19 UTCUpdated Record last modified

msyk fmdataapi UPGRADE

Affected: <= 22

Fixed in: newer than 22

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy fmdataapi || rpm -q fmdataapi || fmdataapi --version

2. UPGRADE to newer than 22 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade fmdataapi

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade fmdataapi

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-4431?

fmdataapi: upgrade to newer than 22. Exact commands for each OS are on this page.

Is CVE-2021-4431 being exploited?

CVE-2021-4431 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-4431 affect?

CVE-2021-4431 affects fmdataapi. Severity is low (CVSS 3.5). 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 remot

How urgent is CVE-2021-4431?

Priority 25/100. No elevated risk signals yet.

Software pages

PHP vulnerabilities

References

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