CVE-2025-59849 is a vulnerability identified in HCL Software's BigFix Remote Control Lite Web Portal, specifically in versions 10.1.0.0326 and earlier. The root cause is improper restriction of rendered UI layers or frames, categorized under CWE-1021, combined with weaknesses related to insufficient control over permissions (CWE-693). The vulnerability arises from inadequate Content Security Policy (CSP) management, which is designed to restrict the sources from which web content can be loaded and executed. Improper CSP configuration can allow an attacker to inject and execute malicious scripts within the context of the web portal. This could lead to unauthorized disclosure or modification of sensitive information displayed or processed by the portal. The CVSS 3.1 base score is 4.7 (medium), reflecting that the attack vector is network-based (AV:N), requires high attack complexity (AC:H), no privileges (PR:N), but does require user interaction (UI:R). The scope is changed (S:C), indicating that exploitation could affect resources beyond the vulnerable component. The impact is limited to low confidentiality and integrity loss, with no impact on availability. No public exploits are known at this time, but the vulnerability could be leveraged in targeted attacks against organizations using the affected versions of BigFix Remote Control. The portal is typically used for remote control and management of endpoints, making it a valuable target for attackers seeking lateral movement or data exfiltration capabilities.

For European organizations, this vulnerability poses a risk primarily to the confidentiality and integrity of data managed through the BigFix Remote Control Lite Web Portal. Attackers exploiting this flaw could execute malicious scripts that may steal session tokens, manipulate displayed information, or perform unauthorized actions within the portal. This could lead to unauthorized access to endpoint management functions or exposure of sensitive operational data. Given that BigFix is widely used in enterprise IT environments for endpoint management and security, a successful attack could facilitate further compromise of corporate networks. The medium severity and requirement for user interaction reduce the likelihood of widespread automated exploitation; however, targeted phishing or social engineering campaigns could increase risk. The absence of known exploits in the wild currently limits immediate impact, but organizations should not delay remediation. The potential impact is heightened in sectors with stringent data protection requirements, such as finance, healthcare, and critical infrastructure, common in Europe.

1. Immediately assess and inventory all deployments of HCL BigFix Remote Control to identify affected versions (<= 10.1.0.0326). 2. Apply any available patches or updates from HCL as soon as they are released; monitor vendor advisories closely. 3. If patches are not yet available, implement strict Content Security Policy headers manually to restrict allowed script sources and frame ancestors, minimizing the risk of malicious code execution. 4. Restrict network access to the BigFix Remote Control Lite Web Portal to trusted IP ranges and require VPN or other secure access methods to reduce exposure. 5. Educate users on the risks of phishing and social engineering, as exploitation requires user interaction. 6. Monitor web portal logs for unusual activity or signs of attempted exploitation. 7. Consider deploying web application firewalls (WAFs) with rules to detect and block suspicious script injection attempts targeting the portal. 8. Regularly review and harden the overall security posture of endpoint management infrastructure to limit lateral movement opportunities.