Timeclock PHP 1.04 POST login.php login_userid sql injection

Summaryinfo

A vulnerability was found in Timeclock PHP 1.04. It has been rated as critical. This issue affects some unknown processing of the file login.php of the component POST Handler. Performing a manipulation of the argument login_userid results in sql injection. This vulnerability was named CVE-2021-47966. The attack may be initiated remotely. In addition, an exploit is available.

Detailsinfo

A vulnerability classified as critical has been found in Timeclock PHP 1.04. This affects an unknown function of the file login.php of the component POST Handler. The manipulation of the argument login_userid with an unknown input leads to a sql injection vulnerability. CWE is classifying the issue as CWE-89. The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

The weakness was presented by Tyler Butler as 49849. It is possible to read the advisory at exploit-db.com. This vulnerability is uniquely identified as CVE-2021-47966 since 05/15/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details and a public exploit are known. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 05/16/2026). The attack technique deployed by this issue is T1505 according to MITRE ATT&CK.

The exploit is shared for download at exploit-db.com. It is declared as proof-of-concept. By approaching the search of inurl:login.php it is possible to find vulnerable targets with Google Hacking.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Exploit-DB (49849) and EUVD (EUVD-2021-34819). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Programming Language Software

Vendor

• Timeclock

Name

• PHP

Version

• 1.04

License

• open-source

CPE 2.3info

• 🔒

CPE 2.2info

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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