Server-Side Request Forgery Vulnerability in GetSimple CMS by GetSimple CMS CE
CVE-2026-56661

7.5HIGH

Key Information:

Vendor

Getsimplecms-ce

Status
Getsimplecms-ce
Vendor
CVE Published:
1 October 2026

What is CVE-2026-56661?

GetSimple CMS CE, a widely used content management system, contains a vulnerability whereby its update handler fetches a user-supplied URL via the file_get_contents() function, relying solely on format validation (FILTER_VALIDATE_URL). This insufficient validation permits attackers to direct the server to make requests to arbitrary endpoints, including sensitive internal services. Furthermore, the responses are written to a web-accessible file without proper cleanup, enabling a complete read SSRF attack. This security flaw can lead to exposure of internal data or services. The issue has been resolved in version 1.5.

Affected Version(s)

GetSimpleCMS-CE < 1.5

References

https://github.com/GetSimpleCMS-CE/GetSimpleCMS-CE/securi...
x_refsource_CONFIRM

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
Low
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.