CVE-2021-3985: kimai2 is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Q: How do I fix CVE-2021-3985?

kimai2: upgrade to 1.16.3. Exact commands for each OS are on this page.

Q: Is CVE-2021-3985 being exploited?

CVE-2021-3985 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-2021-3985 affect?

CVE-2021-3985 affects kimai2. Severity is critical (CVSS 9.0). kimai2 is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Q: How urgent is CVE-2021-3985?

Priority 54/100. Critical severity; Public exploit reference

This month

CRITICAL 9.0UPGRADE

CVE-2021-3985 is a critical-severity flaw (CVSS 9.0) affecting kimai2. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

kimai2 is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Why this priority

Critical severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	9.0 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	1.3% (top 30%)
CISA exploited list	No
Weakness	CWE-79
Published	2021-12-01
Last modified	2026-06-17

Publisher (CNA): huntr.dev · Vendor: kimai

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

Am I affected?

Timeline

2021-12-01 11:15 UTCPublished CVE record published
2026-06-17 04:06 UTCUpdated Record last modified

kimai kimai2 UPGRADE

Affected: < 1.16.3

Fixed in: 1.16.3

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy kimai2 || rpm -q kimai2 || kimai2 --version

2. UPGRADE to 1.16.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade kimai2

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade kimai2

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-2021-3985?

kimai2: upgrade to 1.16.3. Exact commands for each OS are on this page.

Is CVE-2021-3985 being exploited?

CVE-2021-3985 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-2021-3985 affect?

CVE-2021-3985 affects kimai2. Severity is critical (CVSS 9.0). kimai2 is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

How urgent is CVE-2021-3985?

Priority 54/100. Critical severity; Public exploit reference

Related CVEs

CVE-2021-3992 MEDIUM 6.5 UPGRADE kimai2 is vulnerable to Improper Access Control
CVE-2021-3983 MEDIUM 6.1 UPGRADE kimai2 is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

References

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