Apache Sling Commons Log <= 5.4.0 and Apache Sling API <= 2.25.0 is vulnerable to log injection. The ability to forge logs may allow an attacker to cover tracks by injecting fake logs and potentially corrupt log files.
The deepGetOrCreateNode function in impl/operations/AbstractCreateOperation.java in org.apache.sling.servlets.post.bundle 2.2.0 and 2.3.0 in Apache Sling does not properly handle a NULL value that returned when the session does not have permissions to the root node, which allows remote attackers to cause a denial of service (infinite loop) via unspecified vectors.
Multiple cross-site scripting (XSS) vulnerabilities in Apache Sling API before 2.2.2 and Apache Sling Servlets Post before 2.1.2 allow remote attackers to inject arbitrary web script or HTML via the URI, related to (1) org/apache/sling/api/servlets/HtmlResponse and (2) org/apache/sling/servlets/post/HtmlResponse.