MaxSite CMS Unauthenticated RCE via Install Endpoint
48Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 9.3epss 0.9%
from disclosure to weapon2 days
Published on NVDAug 4
1st PoC+2d
exploitation probability
0.9%top 44% of all CVEs
observed exploitation
nono source reports it
1 public exploit(s)
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.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected products
MaxSite · MaxSite CMSpublic PoCs found — 1
githubgithub.com/woshidashabi1126/CVE-2026-70553-PoC★ 1⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.