CVE-2020-21005

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-06-03 · updated 2026-06-17
Weakness: CWE-434

Description

WellCMS 2.0 beta3 is vulnerable to File Upload. A user can log in to the CMS background and upload a picture. Because the upload file type is controllable, the user can modify the upload file type to get webshell.

Affected products

Wellcms: 2.0-beta3

References

http://www.wellcms.cn/read-27.html&&
https://github.com/Computer2200/-/issues/4
http://www.wellcms.cn/read-27.html&&
https://github.com/Computer2200/-/issues/4

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