No exploitation reportedFix available

CVE-2021-21352

Q: Is CVE-2021-21352 actively exploited?

Active exploitation of CVE-2021-21352 has not been confirmed. Its EPSS score was 1.5% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2021-21352?

CVE-2021-21352 has a CVSS v3 base score of 9.1 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

No exploitation reported by the sources we read.

Published2021-03-03
Fixed in1.19.24.5415
WeaknessCWE-330

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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).

Timeline

dates in UTC

2021-03-0301:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-21352?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-21352?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Anuko time tracker

Branch	Affected	Fixed in	Source
1.19	< 1.19.24.5415	1.19.24.5415	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Anuko time tracker to 1.19.24.5415

Advisories and patches

github.comPatch
github.comMitigation
www.anuko.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CNACVSS 3.16.8read 2026-10-23
NVDCVSS 3.19.1read 2026-10-23
NVDCVSS 2.05read 2026-10-23
CNAweakness (CWE)CWE-330read 2026-10-23
FIRST EPSSEPSS score1.5 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Published: 2021-03-03
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2021-21352?

Is CVE-2021-21352 actively exploited?

Active exploitation of CVE-2021-21352 has not been confirmed. Its EPSS score was 1.5% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-21352?

CVE-2021-21352 has a CVSS v3 base score of 9.1 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

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