CVE-2025-48355 is a vulnerability classified under CWE-497, which pertains to the exposure of sensitive system information to an unauthorized control sphere. This vulnerability affects the ProveSource Social Proof product developed by ProveSource LTD, specifically versions up to 3.0.5. The issue allows an attacker to retrieve embedded sensitive data without requiring any authentication or user interaction. According to the CVSS v3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N), the vulnerability can be exploited remotely over the network with low attack complexity, no privileges required, and no user interaction needed. The impact is limited to confidentiality, with no effect on integrity or availability. The vulnerability does not have any known exploits in the wild as of the published date (August 21, 2025), and no patches have been linked yet. The exposure of sensitive information could include configuration details, API keys, or other embedded secrets within the ProveSource Social Proof implementation, which could be leveraged by attackers for further attacks or reconnaissance. Since ProveSource Social Proof is a marketing tool that displays social proof notifications on websites, the vulnerability likely resides in the way it handles or exposes embedded data within its scripts or backend services. This could allow attackers to gather information about the system or environment that should remain confidential.

For European organizations using ProveSource Social Proof, this vulnerability poses a risk of unauthorized disclosure of sensitive information that could aid attackers in crafting more targeted attacks or gaining unauthorized access to other systems. Although the direct impact on system integrity and availability is absent, the confidentiality breach could lead to reputational damage, especially for companies handling personal or sensitive customer data under strict regulations such as GDPR. Attackers could potentially use the exposed information to escalate privileges or bypass security controls in subsequent attack phases. The medium severity rating reflects the limited but non-negligible risk. Organizations in sectors with high compliance requirements, such as finance, healthcare, and e-commerce, may face increased scrutiny if such data exposure leads to regulatory violations.

Since no patches are currently available, European organizations should implement compensating controls immediately. These include: 1) Conducting a thorough audit of ProveSource Social Proof deployments to identify and isolate instances exposing sensitive data. 2) Restricting network access to the ProveSource components by implementing web application firewalls (WAFs) and IP whitelisting to limit exposure to trusted sources. 3) Reviewing and minimizing the amount of sensitive data embedded or exposed through ProveSource configurations and scripts. 4) Monitoring network traffic and logs for unusual access patterns or data exfiltration attempts related to ProveSource endpoints. 5) Engaging with ProveSource LTD for timely updates and patches, and planning for prompt application of fixes once available. 6) Considering temporary removal or replacement of ProveSource Social Proof on critical websites until the vulnerability is remediated. 7) Educating security teams about the nature of the vulnerability to enhance detection and response capabilities.