Analysis of the Bomgar Remote Support Portal JavaStart.jar Applet 52790 and earlier revealed that it is vulnerable to a path traversal vulnerability. The archive can be downloaded from a given Bomgar Remote Support Portal deployment at https://domain/api/content/JavaStart.jar and is callable from an arbitrary website using <object> and/or <appletHTML> tags. Successful exploitation results in file creation/modification/deletion in the operating system and with privileges of the user that ran the Java applet.
Conclusion & alert: CVE-2017-12815 is rated High Risk (68.8/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 1.99%).Core evidence: EPSS rose +1.47% over the last day, indicating growing attacker interest.Mandatory action: High exploitation likelihood—assess exposure and prioritize remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
Exploit prediction scoring system (EPSS) score for CVE-2017-12815
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).