CVE-2026-56660 GetSimple CMS CE - Remote Code Execution

GetSimple CMS CE < 1.5 contains a remote code execution caused by unsafe ZIP archive extraction and directory traversal in UpdateCE.php, letting attackers execute arbitrary PHP code as the web-server user, exploit requires processing a malicious archive.

CVSS base score 9.1 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.53% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Remote Code Execution
Impact
Remote Code Execution, Path Traversal
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Published
1 October 2026
Updated
15 October 2026
Weakness
CWE-352

Vendor fix

Update to version 1.5 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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