invisioncommunity Invision Power Board up to 5.0.6 Template String themeeditor.php makeProcessFunction special elements used in a template engine

Summaryinfo

A vulnerability has been found in invisioncommunity Invision Power Board up to 5.0.6 and classified as critical. Affected is the function Theme::makeProcessFunction of the file themeeditor.php of the component Template String Handler. This manipulation causes improper neutralization of special elements used in a template engine. The identification of this vulnerability is CVE-2025-47916. It is possible to initiate the attack remotely. Furthermore, there is an exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in invisioncommunity Invision Power Board up to 5.0.6. It has been declared as critical. Affected by this vulnerability is the function Theme::makeProcessFunction of the file themeeditor.php of the component Template String Handler. The manipulation with an unknown input leads to a improper neutralization of special elements used in a template engine vulnerability. The CWE definition for the vulnerability is CWE-1336. The product uses a template engine to insert or process externally-influenced input, but it does not neutralize or incorrectly neutralizes special elements or syntax that can be interpreted as template expressions or other code directives when processed by the engine. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at invisioncommunity.com. This vulnerability is known as CVE-2025-47916 since 05/14/2025. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details and also a public exploit are known. The attack technique deployed by this issue is T1221 according to MITRE ATT&CK.

It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept. By approaching the search of inurl:themeeditor.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 5.0.7 eliminates this vulnerability.

The vulnerability is also documented in the databases at Exploit-DB (52294) and EUVD (EUVD-2025-15448). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Forum Software

Vendor

• invisioncommunity

Name

• Invision Power Board

Version

• 5.0.0
• 5.0.1
• 5.0.2
• 5.0.3
• 5.0.4
• 5.0.5
• 5.0.6

License

• commercial

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

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Be aware that VulDB is the high quality source for vulnerability data.

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