CVE-2023-31466: An XSS issue was discovered in FSMLabs TimeKeeper 8.0.17

Routine

MEDIUM 5.4UPGRADE

CVE-2023-31466 is a medium-severity flaw (CVSS 5.4) affecting timekeeper. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An XSS issue was discovered in FSMLabs TimeKeeper 8.0.17. On the "Configuration -> Compliance -> Add a new compliance report" and "Configuration -> Timekeeper Configuration -> Add a new source there" screens, there are entry points to inject JavaScript code.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.5% (top 58%)
CISA exploited list	No
Weakness	CWE-79
Published	2023-07-26
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: fsmlabs

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

Am I affected?

Timeline

2023-07-26 20:15 UTCPublished CVE record published
2026-06-17 05:57 UTCUpdated Record last modified

fsmlabs timekeeper UPGRADE

Affected: >= 8.0.17 and <= 8.0.27

Fixed in: newer than 8.0.27

Safe to downgrade to: a release before 8.0.17

1. Check installed version

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

2. UPGRADE to newer than 8.0.27 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade timekeeper

Note

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

3. If no update is available yet, DOWNGRADE to a release before 8.0.17 (Debian / Ubuntu)

apt-cache madison timekeeper sudo apt install timekeeper=<VERSION_BEFORE_8.0.17> sudo apt-mark hold timekeeper

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list timekeeper sudo dnf downgrade timekeeper-<VERSION_BEFORE_8.0.17> sudo dnf versionlock add timekeeper

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2023-31466?

timekeeper: upgrade to newer than 8.0.27. Exact commands for each OS are on this page.

Is CVE-2023-31466 being exploited?

CVE-2023-31466 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-2023-31466 affect?

CVE-2023-31466 affects timekeeper. Severity is medium (CVSS 5.4). An XSS issue was discovered in FSMLabs TimeKeeper 8.0.17. On the "Configuration -> Compliance -> Add a new compliance report" and "Configuration -> Timekeeper Configuration -> Add a new source there" screens, there are entry points to injec

How urgent is CVE-2023-31466?

Priority 34/100. Public exploit reference

Related CVEs

CVE-2023-31465 CRITICAL 9.8 UPGRADE An issue was discovered in FSMLabs TimeKeeper 8.0.17 through 8.0.28

References

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