OCTOBER 7, 2026
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Case File

CVE-2026-56661

HIGH · CVSS 7.5 EPSS 0.26% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-10-01 · Last synced 2026-10-07

CyberRota Analysis

AI-Generated

GetSimple CMS versions prior to 1.5 are vulnerable to a Server-Side Request Forgery (SSRF) attack due to inadequate validation of user-supplied URLs in the update handler. This flaw allows attackers to make the server send requests to arbitrary destinations, potentially exposing sensitive internal services and cloud metadata. Organizations using affected versions should prioritize upgrading to version 1.5 or later to mitigate the risk of unauthorized data exposure.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-56661
Severity
HIGH
CVSS
7.5
EPSS
0.26%

Original NVD Description

GetSimple CMS is a content management system (CMS), and GetSimple CMS CE is the community edition of that CMS. Prior to version 1.5, the update handler fetches a user-supplied URL with file_get_contents() after only format validation (FILTER_VALIDATE_URL) — there is no validation of the request destination. An attacker who can submit the form can make the server issue requests to arbitrary destinations, including internal-only services and cloud metadata endpoints (169.254.169.254). The fetched response body is written to a web-accessible file (/Tmpfile.zip) and is not deleted when the content is not a valid ZIP, turning this into a full-read SSRF: the attacker can retrieve the response of the internal request directly. This issue has been patched in version 1.5.