HOMEVULNERABILITIESCVE-2021-21352
CRITICAL

CVE-2021-21352

CWE-330Published: March 3, 2021· Updated: Jun 17, 2026

9.1
CVSS v3.1

Official 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).

NVD Source

Technical Analysis

CVE-2021-21352 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), with a CVSS base score of 9.1.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected Vendors & Products

anuko1 product(s)
time tracker
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

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

All References (6)

→
https://github.com/anuko/timetracker/commit/40f3d9345adc20e6f28eb9f59e2489aff87fecf5Patch · Third Party Advisory
→
https://github.com/anuko/timetracker/security/advisories/GHSA-43c9-rx4h-4gqqMitigation · Third Party Advisory
→
https://www.anuko.com/time-tracker/index.htmVendor Advisory
→
https://github.com/anuko/timetracker/commit/40f3d9345adc20e6f28eb9f59e2489aff87fecf5Patch · Third Party Advisory
→
https://github.com/anuko/timetracker/security/advisories/GHSA-43c9-rx4h-4gqqMitigation · Third Party Advisory
→
https://www.anuko.com/time-tracker/index.htmVendor Advisory

Quick Facts

CVE IDCVE-2021-21352
CVSS Score9.1 / 10
SeverityCRITICAL
WeaknessCWE-330
CISA KEVNo
Affected1 vendor(s)
PublishedMar 3, 2021

Related CVEs (CWE-330)

CVE-2020-27631
9.8
CVE-2024-21495
9.8
CVE-2023-29332
9.8
CVE-2020-27630
9.8
CVE-2023-46740
9.8
CVE-2024-36389
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-21352 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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