CVE-2026-54611: CWE-94: Improper Control of Generation of Code ('Code Injection') in instantsoft icms2
InstantCMS is a free and open source content management system. Versions prior to 2.18.2 have a Remote Code Execution (RCE) issue that allows remote authenticated attackers to execute any PHP code via the component installer. It is possible to upload a malicious component into the server, however, it won't be installed, but upload files will be executed. Normally all php files in upload folder are not executed, however, by uploading custom .htaccess it becomes possible. Version 2.18.2 contains a fix.
CVE-2026-54611: CWE-94: Improper Control of Generation of Code ('Code Injection') in instantsoft icms2
Description
InstantCMS is a free and open source content management system. Versions prior to 2.18.2 have a Remote Code Execution (RCE) issue that allows remote authenticated attackers to execute any PHP code via the component installer. It is possible to upload a malicious component into the server, however, it won't be installed, but upload files will be executed. Normally all php files in upload folder are not executed, however, by uploading custom .htaccess it becomes possible. Version 2.18.2 contains a fix.
CVSS v3.1
Score 5.5medium
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-15T19:45:23.540Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6aa044c4acd9273b49fa5fb3
Added to database: 09/08/2026, 17:24:20 UTC
Last updated: 09/08/2026, 17:32:05 UTC
Views: 2
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