{"id":"CVE-2026-56661","title":"GetSimple CMS is a content management system (CMS), and GetSimple CMS CE is the community edition of that CMS","summary":"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 (FI…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:L/A:L","cwe":["CWE-918"],"vendor":"GetSimpleCMS-CE","product":"GetSimpleCMS-CE","affected":["GetSimpleCMS-CE < 1.5"],"published":"2026-10-01","updated":"2026-10-01","sourceUpdated":"2026-10-01T20:23:46.493","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-56661","references":[{"url":"https://github.com/GetSimpleCMS-CE/GetSimpleCMS-CE/security/advisories/GHSA-r7v8-mx29-5q8h","label":"security-advisories@github.com"},{"url":"https://github.com/GetSimpleCMS-CE/GetSimpleCMS-CE/security/advisories/GHSA-r7v8-mx29-5q8h","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-01T19:50:31.476852Z"},"ingestedAt":"2026-10-01T19:58:57.559Z","slug":"CVE-2026-56661","body":"## Overview\n\nGetSimple 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":53,"depthScoreParts":{"impact":41.3,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[]}