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TI-2026-22758 Aliases CVE-2026-28495

GetSimple CMS has CSRF to Remote Code Execution via Arbitrary PHP Write in gsconfig.php

Priority MEDIUM 43CWE-352Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Tampering
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-352.

Summary

GetSimple CMS is a content management system. The massiveAdmin plugin (v6.0.3) bundled with GetSimpleCMS-CE v3.3.22 allows an authenticated administrator to overwrite the gsconfig.php configuration file with arbitrary PHP code via the gsconfig editor module. The form lacks CSRF protection, enabling a remote unauthenticated attacker to exploit this via Cross-Site Request Forgery against a logged-in admin, achieving Remote Code Execution (RCE) on the web server.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00352 29th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
GetSimpleCMS-CEGetSimpleCMS-CEup to 3.3.22—No fix listedCNA
  • GetSimpleCMS-CE VendorGetSimpleCMS-CE Affected up to 3.3.22 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:getsimple-ce:getsimple_cms:*:*:*:*:community:*:*:*up to 3.3.22VulnerableGetSimpleCMS-CE
  • cpe:2.3:a:getsimple-ce:getsimple_cms:*:*:*:*:community:*:*:* Versions up to 3.3.22 Vulnerable ·GetSimpleCMS-CE

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-28495

References

Exploit 1

  • TI-2024-36775 GetSimple CMS CE 3.3.19 suffers from arbitrary code execution in the template editing… CVSS 3.1CRITICAL 9.8
  • TI-2025-30771 GetSimple CMS RCE in Edit component CVSS 4.0HIGH 8.6
  • TI-2024-36777 GetSimple CMS CE 3.3.19 is vulnerable to Server-Side Request Forgery (SSRF) in the backend plugin module. CVSS 3.1HIGH 8.8
  • TI-2026-21637 GetSimple CMS: Uploaded Files (feature) Arbitrary File Read Vulnerability CVSS 4.0HIGH 8.8
  • TI-2026-21606 Unauthenticated Information Disclosure via .htaccess Reliance in Sensitive Directories CVSS 4.0HIGH 8.7
  • TI-2024-36776 In the GetSimple CMS CE 3.3.19 management page, Server-Side Request Forgery (SSRF) can be… CVSS 3.1HIGH 7.2
See all 9 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences