CVE-2023-33962 Information

Description

JStachio is a type-safe Java Mustache templating engine. Prior to version 1.0.1 JStachio fails to escape single quotes ' in HTML allowing an attacker to inject malicious code. This vulnerability can be exploited by an attacker to execute arbitrary JavaScript code in the context of other users visiting pages that use this template engine. This can lead to various consequences including session hijacking defacement of web pages theft of sensitive information or even the propagation of malware.

Version 1.0.1 contains a patch for this issue. To mitigate this vulnerability the template engine should properly escape special characters including single quotes. Common practice is to escape ' as &39. As a workaround users can avoid this issue by using only double quotes \ for HTML attributes.

Reference

https://github.com/jstachio/jstachio/security/advisories/GHSA-gwxv-jv83-6qjr https://github.com/jstachio/jstachio/pull/158 https://github.com/jstachio/jstachio/commit/7b2f78377d1284df14c580be762a25af5f8dcd66 https://github.com/jstachio/jstachio/releases/tag/v1.0.1 https://github.com/jstachio/jstachio/issues/157