Description
Invision Community 5.0.0 before 5.0.7 allows remote code execution via crafted template strings to themeeditor.php. The issue lies within the themeeditor controller (file: /applications/core/modules/front/system/themeeditor.php), where a protected method named customCss can be invoked by unauthenticated users. This method passes the value of the content parameter to the Theme::makeProcessFunction() method; hence it is evaluated by the template engine. Accordingly, this can be exploited by unauthenticated attackers to inject and execute arbitrary PHP code by providing crafted template strings.
Problem types
CWE-1336 Improper Neutralization of Special Elements Used in a Template Engine
Product status
5.0.0 (semver) before 5.0.7
References
karmainsecurity.com/KIS-2025-02
seclists.org/fulldisclosure/2025/May/4
invisioncommunity.com/release-notes-v5/507-r41/
karmainsecurity.com/KIS-2025-02