CVE-2026-56662 GetSimple CMS CE - Cross-Site Request Forgery & Remote Code Execution

GetSimple CMS CE < 1.5 contains a cross-site request forgery caused by missing anti-CSRF token and request-origin verification in the UpdateCE update form, letting remote attackers execute arbitrary code via administrator session, exploit requires administrator authentication.

CVSS base score 9.6 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.22% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Cross-Site Request Forgery
Impact
Remote Code Execution, Cross Site Request Forgery, Stored XSS
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Published
1 October 2026
Updated
15 October 2026
Weakness
CWE-352

Vendor fix

Upgrade 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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