CVE-2021-21352 json
Predictable tokens used for password resets
published 2021-03-03 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-8676
- cvss
- 6.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.5%
- EPSS 1.5% chance of exploitation in 30 days, percentile 75%
- public exploits
- 0
- none known
Summary
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).
Patch / fix
Exploit prediction
1.54% chance of exploitation in the next 30 days, higher than 75% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.8 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N |
| NVD | 3.1 | 9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:P/A:N |
Affected products
- anuko timetracker
Classification
- Weakness
-
- CWE-330 Use of Insufficiently Random Values
References
-
github.com
/anuko/timetracker/commit/40f3d9345adc20e6f28eb9f59e2489aff87fecf5
patch, third-party-advisory
-
anuko.com
/time-tracker/index.htm
vendor-advisory
-
github.com
/anuko/timetracker/security/advisories/GHSA-43c9-rx4h-4gqq
mitigation, third-party-advisory
Sources
- CVE List CVE-2021-21352
- NVD CVE-2021-21352
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