CVE-2016-6798
CriticalSummary
The XSS Protection API module in Apache Sling before version 1.0.12 uses an insecure SAX parser to validate the input string, allowing for XXE attacks in scripts using this method.
Risk Assessment
An attacker could read sensitive data on the filesystem, perform SSRF attacks, port-scan behind the firewall, or cause DoS to the application.
Recommendation
It is recommended to upgrade to version 1.0.12 or later to mitigate these vulnerabilities.
Original NVD description (English source)
In the XSS Protection API module before 1.0.12 in Apache Sling, the method XSS.getValidXML() uses an insecure SAX parser to validate the input string, which allows for XXE attacks in all scripts which use this method to validate user input, potentially allowing an attacker to read sensitive data on the filesystem, perform same-site-request-forgery (SSRF), port-scanning behind the firewall or DoS the application.