The Brooklyn theme for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 4.9.9.2 via deserialization of untrusted input in the ot_decode function. This makes it possible for authenticated attackers, with Subscriber-level access and above, to inject a PHP Object. No known POP chain is present in the vulnerable software, which means this vulnerability has no impact unless another plugin or theme containing a POP chain is installed on the site. If a POP chain is present via an additional plugin or theme installed on the target system, it may allow the attacker to perform actions like delete arbitrary files, retrieve sensitive data, or execute code depending on the POP chain present.

Deserialization of Untrusted Data vulnerability in UnitedThemes Brooklyn | Creative Multi-Purpose Responsive WordPress Theme.This issue affects Brooklyn | Creative Multi-Purpose Responsive WordPress Theme: from n/a through 4.9.7.6.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in UnitedThemes Brooklyn | Creative Multi-Purpose Responsive WordPress Theme allows Reflected XSS.This issue affects Brooklyn | Creative Multi-Purpose Responsive WordPress Theme: from n/a through 4.9.7.6.

In Apache Brooklyn before 0.10.0, the REST server is vulnerable to cross-site scripting where one authenticated user can cause scripts to run in the browser of another user authorized to access the first user's resources. This is due to improper escaping of server-side content. There is known to be a proof-of-concept exploit using this vulnerability.

In Apache Brooklyn before 0.10.0, the REST server is vulnerable to cross-site request forgery (CSRF), which could permit a malicious web site to produce a link which, if clicked whilst a user is logged in to Brooklyn, would cause the server to execute the attacker's commands as the user. There is known to be a proof-of-concept exploit using this vulnerability.

Apache Brooklyn uses the SnakeYAML library for parsing YAML inputs. SnakeYAML allows the use of YAML tags to indicate that SnakeYAML should unmarshal data to a Java type. In the default configuration in Brooklyn before 0.10.0, SnakeYAML will allow unmarshalling to any Java type available on the classpath. This could provide an authenticated user with a means to cause the JVM running Brooklyn to load and run Java code without detection by Brooklyn. Such code would have the privileges of the Java process running Brooklyn, including the ability to open files and network connections, and execute system commands. There is known to be a proof-of-concept exploit using this vulnerability.