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TI-2021-22351 Aliases CVE-2021-47734GHSA-62fv-j8g5-r47m

CMSimple 5.4 Authenticated Local File Inclusion Remote Code Execution

Priority HIGH 72CWE-98Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-98.

Summary

CMSimple 5.4 contains an authenticated local file inclusion vulnerability that allows remote attackers to manipulate PHP session files and execute arbitrary code. Attackers can leverage the vulnerability by changing the functions file path and uploading malicious PHP code through session file upload mechanisms.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00782 56th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA and NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
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
CmsimpleCMSimpleCMSimple 5.4—No fix listedCNA
  • CMSimple VendorCmsimple Affected CMSimple 5.4 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:cmsimple:cmsimple:5.4:*:*:*:*:*:*:*5.4VulnerableCmsimple
  • cpe:2.3:a:cmsimple:cmsimple:5.4:*:*:*:*:*:*:* Versions 5.4 Vulnerable ·Cmsimple

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-47734
  2. 2026-10-03 Alias added: GHSA-62fv-j8g5-r47m

References

Exploit 1

Other 1

  • TI-2024-37939 CMSimple 5.16 allows the user to edit log.php file via print page. CVSS 3.1CRITICAL 9.1
  • TI-2024-37940 CMSimple 5.16 allows the user to read cms source code through manipulation of the file… CVSS 3.1HIGH 7.5
  • TI-2024-37938 Insecure Permissions vulnerability in CMSimple v.5.16 allows a remote attacker to obtain… CVSS 3.1HIGH 7.5
  • TI-2024-37937 An issue in CMSimple v.5.16 allows a remote attacker to obtain sensitive information via… CVSS 3.1HIGH 7.5
  • TI-2021-22352 CMSimple 5.4 Authenticated Remote Code Execution via Template Editing CVSS 4.0HIGH 8.6
  • TI-2024-22055 Cross-Site Scripting (XSS) vulnerability in the Settings menu of CMSimple v5.15 allows… CVSS 3.1HIGH 7.4
See all 18 →

Sources

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