CVE-2021-40373 : Security Advisory and Response

playSMS before 1.4.5 allows Arbitrary Code Execution by entering PHP code at the #tabs-information-page of core_main_config, and then executing that code via the index.php?app=main&inc=core_welcome URI.

Understanding CVE-2021-40373

playSMS before version 1.4.5 is vulnerable to Arbitrary Code Execution, which could allow attackers to run malicious PHP code.

What is CVE-2021-40373?

playSMS version prior to 1.4.5 permits the execution of arbitrary PHP code by inputting it at a specific location and then triggering it through a particular URI.

The Impact of CVE-2021-40373

The vulnerability allows threat actors to execute unauthorized PHP code, potentially leading to server compromise, data theft, or other malicious activities.

Technical Details of CVE-2021-40373

playSMS before version 1.4.5 is susceptible to this security flaw.

Vulnerability Description

Type: Arbitrary Code Execution
Location: #tabs-information-page of core_main_config
Execution: Via index.php?app=main&inc=core_welcome URI

Affected Systems and Versions

Affected Product: playSMS
Affected Version: < 1.4.5

Exploitation Mechanism

The vulnerability is exploited by inserting PHP code in a specific area and then triggering its execution through a designated URI.

Mitigation and Prevention

To safeguard systems from CVE-2021-40373, follow these guidelines:

Immediate Steps to Take

Update playSMS to version 1.4.5 or above.
Restrict access to vulnerable pages.
Monitor for any unusual PHP code execution.

Long-Term Security Practices

Regular security audits and code reviews.
Train employees on identifying and reporting suspicious activities.
Implement strict input validation and output encoding practices.

Patching and Updates

Deploy security patches promptly.
Stay informed about new vulnerabilities and updates in playSMS.