CVE-2025-39462 is a Local File Inclusion (LFI) vulnerability found in the PHP-based teamzt Smart Agreements product, affecting versions up to and including 1.0.3. The vulnerability arises from improper control over the filename parameter used in PHP include or require statements. This flaw allows an attacker to manipulate the input that determines which file is included by the PHP script, enabling the inclusion of arbitrary local files on the server. Such an attack can lead to disclosure of sensitive information such as configuration files, source code, or credentials stored on the server. In some cases, it may also facilitate remote code execution if the attacker can include files containing malicious code or upload files to the server. The vulnerability does not currently have a CVSS score and no known exploits have been reported in the wild. However, the risk is significant due to the nature of LFI vulnerabilities and their potential impact. The vulnerability affects all deployments of Smart Agreements up to version 1.0.3, which is a PHP application used for managing digital agreements. The root cause is insufficient validation or sanitization of user input controlling the include/require filename, violating secure coding practices. Since PHP include statements execute the included file, this vulnerability can compromise confidentiality, integrity, and availability of affected systems. The vulnerability was published on April 17, 2025, and assigned by Patchstack. No patches or fixes have been linked yet, indicating that users must apply mitigations or await vendor updates.

The impact of CVE-2025-39462 can be severe for organizations using the affected Smart Agreements software. Successful exploitation allows attackers to read arbitrary files on the server, potentially exposing sensitive data such as credentials, private keys, or business-critical documents. This can lead to data breaches and loss of confidentiality. In some scenarios, attackers may achieve remote code execution by including files containing malicious code or leveraging other vulnerabilities, threatening system integrity and availability. The vulnerability could also be used as a pivot point for further attacks within the network. Organizations handling sensitive contracts or legal agreements via Smart Agreements are at particular risk, as exposure of such data can have legal and financial consequences. The lack of authentication requirements or user interaction in some configurations increases the attack surface. Additionally, the absence of known exploits does not eliminate the risk, as attackers may develop exploits once the vulnerability details are public. Overall, the vulnerability threatens confidentiality, integrity, and availability of affected systems and data.

To mitigate CVE-2025-39462, organizations should implement the following specific measures: 1) Immediately restrict or sanitize all user inputs that control file inclusion paths, using whitelisting approaches to allow only known safe files or directories. 2) Employ PHP functions like realpath() to resolve and verify file paths before inclusion, ensuring they reside within authorized directories. 3) Disable remote file inclusion in PHP configuration (allow_url_include=Off) to prevent inclusion of remote resources. 4) Apply strict file system permissions to limit access to sensitive files and directories, preventing unauthorized reading or modification. 5) Monitor application logs and web server logs for suspicious file access patterns or errors indicative of attempted exploitation. 6) If possible, upgrade to a patched version of Smart Agreements once available from the vendor. 7) Use Web Application Firewalls (WAFs) with rules to detect and block malicious input patterns targeting file inclusion. 8) Conduct code reviews and security testing focusing on input validation and file inclusion logic. 9) Isolate the Smart Agreements application environment to minimize impact if compromised. These targeted actions go beyond generic advice and address the root cause and exploitation vectors of the vulnerability.