CVE-2021-41156: anuko/timetracker is an, open source time tracking system

Q: How do I fix CVE-2021-41156?

timetracker: upgrade to 1.19.30.5601. Exact commands for each OS are on this page.

Q: Is CVE-2021-41156 being exploited?

CVE-2021-41156 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-2021-41156 affect?

CVE-2021-41156 affects timetracker. Severity is medium (CVSS 6.8). anuko/timetracker is an, open source time tracking system. In affected versions Time Tracker uses browser_today hidden control on a few pages to collect the today's date from user browsers. Because of not checking this parameter for sanity

Q: How urgent is CVE-2021-41156?

Priority 34/100. No elevated risk signals yet.

Routine

MEDIUM 6.8UPGRADE

CVE-2021-41156 is a medium-severity flaw (CVSS 6.8) affecting timetracker. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

anuko/timetracker is an, open source time tracking system. In affected versions Time Tracker uses browser_today hidden control on a few pages to collect the today's date from user browsers. Because of not checking this parameter for sanity in versions prior to 1.19.30.5601, it was possible to craft an html form with malicious JavaScript, use social engineering to convince logged on users to execute a POST from such form, and have the attacker-sup

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.8 (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	2021-10-18
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: timetracker project

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 21:15 UTCPublished CVE record published
2026-06-17 04:07 UTCUpdated Record last modified

timetracker project timetracker UPGRADE

Affected: < 1.19.30.5601

Fixed in: 1.19.30.5601

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 1.19.30.5601 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade timetracker

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-2021-41156?

timetracker: upgrade to 1.19.30.5601. Exact commands for each OS are on this page.

Is CVE-2021-41156 being exploited?

CVE-2021-41156 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-2021-41156 affect?

CVE-2021-41156 affects timetracker. Severity is medium (CVSS 6.8). anuko/timetracker is an, open source time tracking system. In affected versions Time Tracker uses browser_today hidden control on a few pages to collect the today's date from user browsers. Because of not checking this parameter for sanity

How urgent is CVE-2021-41156?

Priority 34/100. No elevated risk signals yet.

References

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