Critical severity9.8NVD Advisory· Published Feb 1, 2021· Updated Jun 17, 2026

CVE-2020-20287

Description

Unrestricted file upload vulnerability in the yccms 3.3 project. The xhUp function's improper judgment of the request parameters, triggers remote code execution.

Affected products

YCCMS/YCCMS2 versions
cpe:2.3:a:yccms:yccms:3.3:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:yccms:yccms:3.3:*:*:*:*:*:*:*
- (no CPE)range: =3.3
yccms/yccmsdescription

Patches

Vulnerability mechanics

References

blog.jiguang.xyz/posts/remote-code-execution-via-upload-image/nvdExploitThird Party Advisory
www.yccms.netnvdBroken LinkURL Repurposed

News mentions

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cvss	0.637
epss	0.002
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000