CVE-2021-47966

8.8 highEPSS 0.3%

High (8.8). EPSS 0.3% chance of exploitation in the next 30 days.

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.

Severity

CVSS 4.0

8.8 high

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N

CVSS 3.1

8.2 high

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

EPSS: 0.3% chance of exploitation in the next 30 days; higher than 19% of CVEs (scores of 2026-10-31)
CWE: CWE-89
Published: 2026-05-15
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

References

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

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