What’s Vulnerable › Vulnerabilities

CVE-2020-20287

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-02-01 · updated 2026-06-17
• Weakness: CWE-434

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: 3.3

References

• http://www.yccms.net/
• https://blog.jiguang.xyz/posts/remote-code-execution-via-upload-image/
• http://www.yccms.net/
• https://blog.jiguang.xyz/posts/remote-code-execution-via-upload-image/

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