CVE-2021-41139

Name: CVE-2021-41139
Creator: NVD / NIST
Published: 2021-10-13T17:15:07.697+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.99%

Last modified Jun 17, 2026

CVE-2021-41139 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. Anuko Time Tracker is an open source, web-based time tracking application written in PHP. When a logged on user selects a date in Time Tracker, it is being passed on via the date parameter in URI. EPSS estimates a 0.99% chance of exploitation in the next 30 days.

Description

Anuko Time Tracker is an open source, web-based time tracking application written in PHP. When a logged on user selects a date in Time Tracker, it is being passed on via the date parameter in URI. Because of not checking this parameter for sanity in versions prior to 1.19.30.5600, it was possible to craft the URI with malicious JavaScript, use social engineering to convince logged on user to click on such link, and have the attacker-supplied JavaScript to be executed in user's browser. This issue is patched in version 1.19.30.5600. As a workaround, one may introduce `ttValidDbDateFormatDate` function as in the latest version and add a call to it within the access checks block in time.php.

Metrics

CVSS 3.1

6.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

0.99%

58.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Anuko	Time Tracker	< 1.19.30.5600

References

https://github.com/anuko/timetracker/commit/559906731f153c9b3a632c2839ed11669b76d593Patch, Third Party Advisory
https://github.com/anuko/timetracker/commit/d3f60bd3e3ea8ff8ec31a596baec6750af601b7cPatch, Third Party Advisory
https://github.com/anuko/timetracker/security/advisories/GHSA-h2v8-87c9-86cwThird Party Advisory
https://github.com/anuko/timetracker/commit/559906731f153c9b3a632c2839ed11669b76d593Patch, Third Party Advisory
https://github.com/anuko/timetracker/commit/d3f60bd3e3ea8ff8ec31a596baec6750af601b7cPatch, Third Party Advisory
https://github.com/anuko/timetracker/security/advisories/GHSA-h2v8-87c9-86cwThird Party Advisory

Timeline

Published: Oct 13, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-41139?

How severe is CVE-2021-41139?

CVE-2021-41139 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.99% probability of exploitation in the next 30 days.

How do I fix CVE-2021-41139?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-41139?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST