CVE-2026-56660

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 in UpdateCE.php downloads a ZIP archive and extracts its contents into the web root without validating file types or extraction paths. Because PHP files are written into a web-accessible directory, an attacker who can cause a malicious archive to be processed achieves remote code execution as the web-server user. Entry names are also used unsafely, allowing directory traversal (../) to write files outside the intended extraction directory. This issue has been patched in version 1.5.

Affected Software

VendorProductVersion RangeStatus
GetSimpleCMS-CEGetSimpleCMS-CE< 1.5affected

Weaknesses

  • CWE-352: CWE-352: Cross-Site Request Forgery (CSRF)
  • CWE-434: CWE-434: Unrestricted Upload of File with Dangerous Type
  • CWE-918: CWE-918: Server-Side Request Forgery (SSRF)

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: poc
    • Automatable: no
    • Technical Impact: total

Additional References

References