ZLMediaKit confines the downloadFile API to a configured set of root directories with a prefix comparison that does not account for directory boundaries. The configuration loader in server/WebApi.cpp builds each root with File::absolutePath("", item, true); because the relative-path argument is empty that helper returns the value without a trailing separator. The handler then accepts a requested path when startwith(filepath, root) holds, so a sibling directory whose name merely begins with the configured root string satisfies the test and is served. The only other guard rejects a path containing two dots, which this requires none of. The equivalent confinement check for the ordinary static file server in src/Http/HttpFileManager.cpp computes its root with a non-empty second argument, which appends the separator before comparing, and so is not affected. The endpoint requires the configured API secret, so this grants no privilege beyond what that secret already implies, but it reads files outside the directory the operator confined it to, and the reference container runs the server as root.

ZLMediaKit is a streaming media service framework. the VP9 RTP payload parser in ext-codec/VP9Rtp.cpp reads multiple fields from the RTP payload based on flag bits in the first byte, without verifying that sufficient data exists in the buffer. A crafted VP9 RTP packet with a 1-byte payload (0xFF, all flags set) causes the parser to read past the end of the allocated buffer, resulting in a heap-buffer-overflow. This vulnerability is fixed with commit 435dcbcbbf700fd63b2ca9eac6cef3b5ea75169d.

Incorrect Access Control vulnerability in ZLMediaKit versions 1.0 through 8.0, allows remote attackers to escalate privileges and obtain sensitive information. The application system enables the http API interface by default and uses the secret parameter method to authenticate the http restful api interface, but the secret is hardcoded by default.

ZLMediaKit 4.0 is vulnerable to Directory Traversal.

Cross Site Scripting vulnerability in ZLMediaKiet v.4.0 and v.5.0 allows an attacker to execute arbitrary code via a crafted script to the URL.

An attacker can send malicious RTMP requests to make the ZLMediaKit server crash remotely. Affected version is below commit 7d8b212a3c3368bc2f6507cb74664fc419eb9327.