CVE-2021-47753

phpKF CMS 3.00 Beta y6 - Remote Code Execution (RCE) (Unauthenticated)

Published Jan 15, 2026 CVSS 4.0 · 9.3 Critical EPSS < 1% KEV · Not listed
Description
phpKF CMS 3.00 Beta y6 contains an unauthenticated file upload vulnerability that allows remote attackers to execute arbitrary code by bypassing file extension checks. Attackers can upload a PHP file disguised as a PNG, rename it, and execute system commands through a crafted web shell parameter.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Phpkf cms
CPEs cpe:2.3:a:phpkf:cms:3.00:beta_y6:*:*:*:*:*:*
Vendors & Products Phpkf cms
Type Values Removed Values Added
First Time appeared Phpkf
Phpkf phpkf
Vendors & Products Phpkf
Phpkf phpkf
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description phpKF CMS 3.00 Beta y6 contains an unauthenticated file upload vulnerability that allows remote attackers to execute arbitrary code by bypassing file extension checks. Attackers can upload a PHP file disguised as a PNG, rename it, and execute system commands through a crafted web shell parameter.
Title phpKF CMS 3.00 Beta y6 - Remote Code Execution (RCE) (Unauthenticated)
Weaknesses CWE-434
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 9.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Apr 7, 2026, 2:05 PM
Reserved
Jan 10, 2026, 1:48 PM
Status
Analyzed
Published
Jan 15, 2026, 4:16 PM
Modified
Jun 17, 2026, 4:18 AM