H Ming

This issue is an incomplete blacklist leading to a Cross-Site Scripting (XSS) condition in Apache Zeppelin.

An improper input validation issue exists in Apache Zeppelin. The fix for JDBC URL validation did not account for URL encoded input.

The issue is related to improper encoding or escaping of output, allowing attackers to modify `helium.json` and perform cross-site scripting attacks on normal users.

The issue is related to the deserialization of untrusted data, which allows attackers to bypass the `autoDeserialize` option filtering by adding blanks. This can potentially lead to the execution of arbitrary code.