CVE-2025-63051 is an information disclosure vulnerability identified in the sizam REHub Framework, a popular WordPress-based multi-vendor marketplace and affiliate marketing theme/framework. The vulnerability allows an attacker with network access and limited privileges (authenticated user) to retrieve embedded sensitive system information that should not be exposed to their control sphere. This could include configuration details, internal paths, or other sensitive metadata embedded within the framework’s code or responses. The vulnerability affects all versions prior to 19.9.9.4, with no specific version range given beyond that. The CVSS v3.1 base score is 4.3, indicating a medium severity primarily due to the confidentiality impact and the requirement for low privileges but no user interaction. The attack vector is network-based, and no integrity or availability impacts are noted. No known public exploits or patches are currently available, but the vulnerability has been officially published and reserved since October 2025. The exposure of sensitive system information can facilitate further targeted attacks, such as privilege escalation or exploitation of other vulnerabilities by providing attackers with valuable reconnaissance data.

For European organizations, the exposure of sensitive system information can lead to increased risk of targeted attacks, including privilege escalation, lateral movement, or exploitation of other vulnerabilities within the affected environment. Organizations relying on the REHub Framework for e-commerce, affiliate marketing, or marketplace operations may face data confidentiality risks, potentially exposing business logic, internal configurations, or user-related data. While the vulnerability does not directly impact system integrity or availability, the indirect consequences could include reputational damage, compliance issues under GDPR due to unauthorized data exposure, and increased attack surface for threat actors. The medium severity suggests that while immediate catastrophic damage is unlikely, the vulnerability should be addressed promptly to prevent escalation. European companies with public-facing websites using this framework are particularly at risk of reconnaissance by attackers, which could lead to more severe follow-on attacks.

1. Immediately audit and restrict access controls to the REHub Framework administrative and user areas to ensure that only trusted authenticated users have access. 2. Monitor web server and application logs for unusual or unauthorized attempts to access sensitive endpoints or data within the framework. 3. Disable or limit any debug or verbose error reporting features that may leak sensitive system information. 4. Engage with the vendor sizam or trusted security advisories to obtain and apply patches or updates as soon as they become available for version 19.9.9.4 or later. 5. Implement Web Application Firewall (WAF) rules to detect and block suspicious requests targeting known vulnerable endpoints. 6. Conduct internal penetration testing focusing on information disclosure vectors within the REHub Framework. 7. Educate administrators and developers about the risks of exposing sensitive system information and encourage secure coding and configuration practices. 8. Consider isolating the REHub Framework environment or deploying it behind additional security layers to reduce exposure.