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Vulnerability record · CVE-2021-41139 · published 13 October 2021

CVE-2021-41139: Anuko time tracker cross-site scripting vulnerability

Anuko · Time Tracker

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.

6.1 CVSS 3.1 Medium EPSS 1.0% · top 37.9% CWE-79 · Cross-site scripting
6.1CVSS 3.1 base score, v2 4.3
1.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/anuko/timetracker/commit/559906731f153c9b3a632c2839ed11669b76d593 PatchThird Party Advisory
https://github.com/anuko/timetracker/commit/d3f60bd3e3ea8ff8ec31a596baec6750af601b7c PatchThird Party Advisory
https://github.com/anuko/timetracker/security/advisories/GHSA-h2v8-87c9-86cw Third Party Advisory
https://github.com/anuko/timetracker/commit/559906731f153c9b3a632c2839ed11669b76d593 PatchThird Party Advisory
https://github.com/anuko/timetracker/commit/d3f60bd3e3ea8ff8ec31a596baec6750af601b7c PatchThird Party Advisory
https://github.com/anuko/timetracker/security/advisories/GHSA-h2v8-87c9-86cw Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-41139), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.