CVE-2021-21352

Predictable tokens used for password resets

CRITICAL
9.1
CVSS Score
Published: March 3, 2021 at 12:20 AM UTC
Updated: June 17, 2026 at 03:35 AM UTC
1 product affected across 1 vendorTime Tracker

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Severity
CRITICAL9.1
Exploit prediction
EPSS 2%

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 1.19.24.5415
Affected range stops below 1.19.24.5415, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-330

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