This indicates an attack attempt to exploit an Directory Traversal Vulnerability in TIBCO JasperReports Server.
The vulnerability is due to an error in the vulnerable application when handling a maliciously crafted request. An attacker can exploit this to access arbitrary files on the affected machine via a crafted request.
TIBCO JasperReports Server version 6.2.4 and prior
TIBCO JasperReports Server version 6.3.3, version 6.3.2, and version 6.3.0
TIBCO JasperReports Server version 6.4.2 and version 6.4.0
TIBCO JasperReports Server ActiveMatrix BPM version 6.4.2 and prior
TIBCO JasperReports Server Community version 6.4.2 and prior
TIBCO JasperReports AWS with multi-tenancy version 6.4.2 and prior
TIBCO JasperReports Reporting and Analytics AWS version 6.4.2 and prior
Information Disclosure: Remote attackers can gain sensitive information from vulnerable systems.
Apply the most recent upgrade or patch from the vendor.