CVE-2026-54611: medium-severity vulnerability in instantsoft icms2
InstantCMS has Remote Code Execution in package installer
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.5epss 0.7%
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:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H
Affected products
instantsoft · icms2Related CVEs — instantsoft icms2
In the same product, most dangerous first.
CVE-2024-31212MEDIUMSQL injection in index_chart_data actionEPSS 0.9%CVE-2025-59055MEDIUMInstantCMS vulnerable to Server-Side Request Forgery via package installerEPSS 0.5%CVE-2024-31213LOWInstantCMS Open Redirect vulnerabilityEPSS 0.4%CVE-2024-50348MEDIUMInstantCMS has a Cross Site Scripting VulnerabilityEPSS 0.3%CVE-2026-48707LOWInstantCMS vulnerable to SSRF via upload redirect bypass allows internal network service scanningEPSS 0.3%CVE-2026-28281HIGHInstantCMS has Multiple CSRF VulnerabilitiesEPSS 0.2%