CVE-2025-48287 is a critical security vulnerability classified under CWE-502, which pertains to the deserialization of untrusted data. This vulnerability affects the product Pix 4x sem juros by Pagaleve, specifically versions up to 1.6.9. Deserialization vulnerabilities occur when an application deserializes data from untrusted sources without sufficient validation or sanitization, allowing attackers to inject malicious objects. In this case, the vulnerability enables object injection, which can lead to remote code execution, privilege escalation, or other malicious activities. The CVSS v3.1 base score of 9.8 indicates a critical severity, with an attack vector that is network-based (AV:N), requiring no privileges (PR:N) or user interaction (UI:N), and impacting confidentiality, integrity, and availability at a high level (C:H/I:H/A:H). This means an attacker can exploit this vulnerability remotely without authentication or user involvement, potentially taking full control over the affected system. The vulnerability is present in the deserialization process of the Pix 4x sem juros application, which is likely used for payment processing or financial transactions given the product name and vendor context. No patches or fixes have been linked yet, and there are no known exploits in the wild at the time of publication, but the critical nature and ease of exploitation make this a high-risk issue that requires immediate attention.

For European organizations, the impact of this vulnerability can be severe, especially for those using or integrating the Pagaleve Pix 4x sem juros payment solution or related services. Exploitation could lead to unauthorized access to sensitive financial data, manipulation of payment transactions, and disruption of payment services, which can cause financial losses, reputational damage, and regulatory penalties under GDPR and other data protection laws. The ability to execute arbitrary code remotely without authentication means attackers could use compromised systems as a foothold for broader network infiltration, data exfiltration, or launching further attacks. Financial institutions, e-commerce platforms, and businesses relying on Pagaleve’s payment infrastructure are at particular risk. Additionally, the disruption of payment services could affect customer trust and operational continuity, impacting business-critical functions. Given the criticality and the potential for widespread impact, European organizations must prioritize detection and remediation efforts to mitigate risks associated with this vulnerability.

1. Immediate isolation and monitoring of systems running Pix 4x sem juros to detect unusual activity or signs of exploitation. 2. Implement strict input validation and deserialization controls, such as using allowlists for classes during deserialization or employing safer serialization libraries that do not allow arbitrary object creation. 3. Employ network segmentation and firewall rules to limit exposure of the vulnerable service to untrusted networks. 4. Conduct thorough code reviews and security testing focusing on deserialization logic within the application. 5. Engage with Pagaleve for official patches or updates and apply them promptly once available. 6. Use runtime application self-protection (RASP) or web application firewalls (WAF) with rules targeting deserialization attack patterns to provide an additional layer of defense. 7. Educate development and security teams about the risks of insecure deserialization and best practices for secure coding. 8. Prepare incident response plans specifically addressing potential exploitation scenarios of this vulnerability to ensure rapid containment and recovery.