CVE-2021-47734

HIGH 7.8

CMSimple 5.4 Authenticated Local File Inclusion Remote Code Execution

CVSS Score

7.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-98
Vendor	cmsimple
Product	cmsimple
Published	Dec 23, 2025
Last Updated	Mar 17, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

Cmsimple / CMSimple

CMSimple 5.4

References

NVD ↗ CVE.org ↗ EPSS Data ↗

exploit-db.com: https://www.exploit-db.com/exploits/50547 cmsimple.org: https://www.cmsimple.org/en/ vulncheck.com: https://www.vulncheck.com/advisories/cmsimple-authenticated-local-file-inclusion-remote-code-execution

Credits

S1lv3r