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TI-2021-09900 Aliases CVE-2021-28976GHSA-g2wx-83fr-2mf4

Remote Code Execution vulnerability in GetSimpleCMS before 3.3.16 in admin/upload.php via phar filess.

Priority MEDIUM 42CWE-434Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-434.

Summary

Remote Code Execution vulnerability in GetSimpleCMS before 3.3.16 in admin/upload.php via phar filess.

Why it matters now

EPSS 0.07548 94th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:get-simple:getsimplecms:*:*:*:*:*:*:*:*before 3.3.15VulnerableGetSimple CMS
  • cpe:2.3:a:get-simple:getsimplecms:*:*:*:*:*:*:*:* Versions before 3.3.15 Vulnerable ·GetSimple CMS

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-28976
  2. 2026-10-03 Alias added: GHSA-g2wx-83fr-2mf4

References

Advisory 1

  • TI-2023-24706 An issue in GetSimpleCMS v.3.4.0a allows a remote attacker to execute arbitrary code via… CVSS 3.1CRITICAL 9.8
  • TI-2021-22474 GetSimple CMS Custom JS 0.1 - CSRF to XSS to RCE CVSS 4.0HIGH 8.5
  • TI-2013-06175 GetSimple CMS 3.2.1 Authenticated RCE via Arbitrary PHP File Upload CVSS 4.0HIGH 8.7
  • TI-2021-22394 GetSimple CMS My SMTP Contact Plugin 1.1.2 - PHP Code Injection CVSS 4.0HIGH 8.6
  • TI-2024-10309 GetSimpleCMS profile.php cross-site request forgery CVSS 4.0MEDIUM 6.9
  • TI-2023-24705 Cross Site Scripting vulnerability in GetSimpleCMS v.3.4.0a allows a remote attacker to… CVSS 3.1MEDIUM 5.4
See all 20 →

Sources

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