CVE-2021-47966

HIGH 8.2

PHP Timeclock 1.04 SQL Injection via login.php

CVSS Score

8.2

EPSS Score

0.0%

EPSS Percentile

0th

PHP Timeclock 1.04 contains time-based and boolean-based blind SQL injection vulnerabilities in the login_userid parameter of login.php that allows unauthenticated attackers to extract database contents. Attackers can submit crafted POST requests with SQL payloads using SLEEP functions or RLIKE conditional statements to dump sensitive database information including employee names and credentials.

CWE	CWE-89
Vendor	timeclock
Product	php timeclock
Published	May 15, 2026

Stay Ahead of the Next One

Get instant alerts for timeclock php timeclock

Be the first to know when new high vulnerabilities affecting timeclock php timeclock are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

Low

Availability

None

Affected Versions

Timeclock / PHP Timeclock

1.04

References

NVD ↗ CVE.org ↗ EPSS Data ↗

exploit-db.com: https://www.exploit-db.com/exploits/49849 timeclock.sourceforge.net: http://timeclock.sourceforge.net sourceforge.net: https://sourceforge.net/projects/timeclock/files/PHP%20Timeclock/PHP%20Timeclock%201.04/ vulncheck.com: https://www.vulncheck.com/advisories/php-timeclock-sql-injection-via-login-php

Credits

Tyler Butler