CVE-2020-37023

Koken CMS 0.22.24 - Arbitrary File Upload

Koken CMS 0.22.24 contains a file upload vulnerability that allows authenticated attackers to bypass file extension restrictions by renaming malicious PHP files. Attackers can upload PHP files with system command execution capabilities by manipulating the file upload request through a web proxy and changing the file extension.

Affected

Koken · Koken CMS

CVSS v4.0 VULNCHECK

8.7 HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 VULNCHECK

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

EPSS

0.70% chance of exploitation in the next 30 days, 52nd percentile

Published

2026-01-30

Updated

2026-02-03

Proof-of-concept exploits (2)

• https://www.exploit-db.com/exploits/48706
• V1n1v131r4/Bypass-File-Upload-on-Koken-CMS/blob/master/README.md1★ · 2020-07-15

References

• CVE Record
• NVD entry

Related

• CVE-2017-7317
• CVE-2019-19889
• CVE-2019-19890
• CVE-2019-19916
• CVE-2019-20203
• CVE-2019-20204