CVE-2025-41010 is a medium-severity vulnerability affecting all versions of Hiberus Sintra, a software product developed by Hiberus. The vulnerability stems from an incorrect Cross-Origin Resource Sharing (CORS) configuration, specifically a permissive cross-domain security policy that allows untrusted domains to interact with the application. CORS is a browser mechanism that controls how web applications running on one domain can request resources from another domain. The security model relies on the server validating the Origin header and responding with appropriate Access-Control-Allow-* headers to restrict access. In this case, the Hiberus Sintra product improperly configures CORS, potentially allowing any origin, including untrusted or malicious domains, to make cross-origin requests. This risk is exacerbated when the Access-Control-Allow-Credentials header is enabled, which permits browsers to send credentials such as cookies or HTTP authentication information along with cross-origin requests. An attacker exploiting this vulnerability could craft malicious web pages that perform privileged actions on behalf of authenticated users or access sensitive information exposed by the application. The vulnerability does not require authentication or privileges to exploit, but it does require user interaction (e.g., visiting a malicious website). The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N) reflects network attack vector, low attack complexity, no privileges or authentication required, user interaction needed, and low to limited impact on confidentiality and integrity, with no impact on availability. There are no known exploits in the wild and no patches currently available. The vulnerability is classified under CWE-942, which relates to permissive cross-domain policies allowing untrusted domains.

For European organizations using Hiberus Sintra, this vulnerability could lead to unauthorized access to sensitive data or unintended privileged actions performed via cross-origin requests. The risk is particularly relevant for web applications handling confidential or personal data, including those subject to GDPR regulations. Exploitation could result in data leakage, session hijacking, or unauthorized transactions, undermining data confidentiality and integrity. While availability impact is not indicated, reputational damage and regulatory penalties could be significant if sensitive data is exposed. The requirement for user interaction means phishing or social engineering attacks could be used to lure users into visiting malicious sites that exploit this vulnerability. Organizations in sectors such as finance, healthcare, and government, which often use web applications with sensitive data, could face higher risks. The lack of patches necessitates immediate mitigation to prevent exploitation.

1. Implement strict CORS policies by explicitly specifying trusted origins rather than using wildcard or overly permissive settings. 2. Disable Access-Control-Allow-Credentials unless absolutely necessary, and if enabled, ensure only trusted origins are allowed. 3. Conduct a thorough audit of all CORS configurations in Hiberus Sintra deployments to identify and remediate permissive settings. 4. Employ Content Security Policy (CSP) headers to restrict the domains that can interact with the application. 5. Educate users about phishing risks to reduce the likelihood of user interaction exploitation. 6. Monitor network traffic and application logs for unusual cross-origin requests or suspicious activity. 7. Engage with Hiberus for updates or patches and apply them promptly once available. 8. Consider implementing Web Application Firewalls (WAF) with rules to detect and block suspicious CORS requests. 9. Use security testing tools to verify that CORS policies are correctly enforced post-mitigation.