What’s Vulnerable › Vulnerabilities

CVE-2020-12255

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 57.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-05-18 · updated 2026-06-17
• Weakness: CWE-434

Description

rConfig 3.9.4 is vulnerable to remote code execution due to improper validation in the file upload functionality. vendor.crud.php accepts a file upload by checking content-type without considering the file extension and header. Thus, an attacker can exploit this by uploading a .php file to vendor.php that contains arbitrary PHP code and changing the content-type to image/gif.

Affected products

• rconfig: 3.9.4

References

• https://gist.github.com/farid007/9f6ad063645d5b1550298c8b9ae953ff
• https://gist.github.com/farid007/9f6ad063645d5b1550298c8b9ae953ff

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