{"id":"CVE-2026-70553","published":"2026-08-04T20:16:56.023","lastModified":"2026-08-05T20:17:17.020","description":"MaxSite CMS contains a remote code execution vulnerability that allows unauthenticated attackers to inject arbitrary PHP code into the application configuration file by submitting crafted POST requests to the install endpoint after installation is complete. Attackers can supply a malicious db_dbprefix value containing a single quote to break out of a PHP string literal in application/config/database.php, appending attacker-controlled PHP statements that are executed by the web server on every subsequent request, resulting in persistent unauthenticated remote code execution as the web-server process user.","cvssScore":9.8,"cvssSeverity":"CRITICAL","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwes":["CWE-94"],"vendors":[],"products":[],"references":[{"url":"https://github.com/maxsite/cms","tags":[]},{"url":"https://max-3000.com/page/maxsite-cms-109-6","tags":[]},{"url":"https://www.vulncheck.com/advisories/maxsite-cms-unauthenticated-rce-via-install-endpoint","tags":[]}],"exploitRefs":[{"url":"https://github.com/maxsite/cms","tags":[]}],"hasPoc":true,"ai":{"summary":"This vulnerability allows unauthenticated attackers to inject arbitrary PHP code into the application configuration file, leading to persistent remote code execution as the web-server process user.","exploitability":"Exploitation is relatively straightforward once the attacker has control over the install endpoint after initial installation. Precondition is that the application has been installed and the endpoint is accessible.","blast_radius":"If exploited, the impact is severe as it allows unauthenticated attackers to execute arbitrary code, potentially leading to full compromise of the web server and application data.","remediation":"Disable the install endpoint after initial setup or restrict access to it. Alternatively, upgrade to the latest version if a patch is available.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["rce","web","config-injection","unauth"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-09-28T09:01:41.781Z"}}