{"id":"CVE-2026-54611","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-54611","generatedAt":"2026-10-28T00:20:06.084Z","title":"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.","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.","published":"2026-09-08T18:17:41.000Z","lastModified":"2026-09-09T18:16:59.000Z","status":"Deferred","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":5.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H"},"cwe":["CWE-94","CWE-434"],"affected":[],"epss":{"score":0.00663,"percentile":0.51429,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.66%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://github.com/instantsoft/icms2/commit/44f3a9d04a3207c82cdc756599cbdf084a02858f","source":"security-advisories@github.com"},{"url":"https://github.com/instantsoft/icms2/security/advisories/GHSA-vvgv-h28h-p2m5","source":"security-advisories@github.com"},{"url":"https://github.com/instantsoft/icms2/security/advisories/GHSA-vvgv-h28h-p2m5","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-54611","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}