What’s Vulnerable › Vulnerabilities

CVE-2021-21352: Predictable tokens used for password resets

• Severity: critical (CVSS 9.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-03-03 · updated 2026-06-17
• Weakness: CWE-330

Description

Anuko Time Tracker is an open source, web-based time tracking application written in PHP. In TimeTracker before version 1.19.24.5415 tokens used in password reset feature in Time Tracker are based on system time and, therefore, are predictable. This opens a window for brute force attacks to guess user tokens and, once successful, change user passwords, including that of a system administrator. This vulnerability is pathced in version 1.19.24.5415 (started to use more secure tokens) with an additional improvement in 1.19.24.5416 (limited an available window for brute force token guessing).

Affected products

• anuko timetracker: before 1.19.24.5415 — fixed in 1.19.24.5415

How to fix

Upgrade to a fixed version: anuko timetracker 1.19.24.5415. Check the vendor advisory for mitigations.

References

• https://github.com/anuko/timetracker/commit/40f3d9345adc20e6f28eb9f59e2489aff87fecf5
• https://github.com/anuko/timetracker/security/advisories/GHSA-43c9-rx4h-4gqq
• https://www.anuko.com/time-tracker/index.htm
• https://github.com/anuko/timetracker/commit/40f3d9345adc20e6f28eb9f59e2489aff87fecf5
• https://github.com/anuko/timetracker/security/advisories/GHSA-43c9-rx4h-4gqq
• https://www.anuko.com/time-tracker/index.htm

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