CVE-2021-42565: myfactory.FMS before 7.1-912 allows XSS via the UID parameter.

Q: How do I fix CVE-2021-42565?

fms: upgrade to 7.1-912. Exact commands for each OS are on this page.

Q: Is CVE-2021-42565 being exploited?

CVE-2021-42565 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-2021-42565 affect?

CVE-2021-42565 affects fms. Severity is medium (CVSS 6.1). myfactory.FMS before 7.1-912 allows XSS via the UID parameter.

Q: How urgent is CVE-2021-42565?

Priority 50/100. EPSS top 7%: very likely to be exploited; Public exploit reference

This month

MEDIUM 6.1UPGRADE

CVE-2021-42565 is a medium-severity flaw (CVSS 6.1) affecting fms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

myfactory.FMS before 7.1-912 allows XSS via the UID parameter.

Why this priority

EPSS top 7%: very likely to be exploited
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	5.8% (top 7%)
CISA exploited list	No
Weakness	CWE-79
Published	2021-10-18
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: myfactory

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

Am I affected?

Timeline

2021-10-18 08:15 UTCPublished CVE record published
2026-06-17 04:09 UTCUpdated Record last modified

myfactory fms UPGRADE

Affected: < 7.1-912

Fixed in: 7.1-912

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 7.1-912 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade fms

Note

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

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: myfactory FMS 7.1-911 - 'Multiple' Reflected Cross-Site Scripting (XSS)
Nuclei scan template: myfactory FMS - Cross-Site Scripting

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-2021-42565?

fms: upgrade to 7.1-912. Exact commands for each OS are on this page.

Is CVE-2021-42565 being exploited?

CVE-2021-42565 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-2021-42565 affect?

CVE-2021-42565 affects fms. Severity is medium (CVSS 6.1). myfactory.FMS before 7.1-912 allows XSS via the UID parameter.

How urgent is CVE-2021-42565?

Priority 50/100. EPSS top 7%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2021-42566 MEDIUM 6.1 UPGRADE myfactory.FMS before 7.1-912 allows XSS via the Error parameter.

References

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