CVE-2020-12255
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.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 58.1%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.
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.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 58.09% probability · 99th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-434
- Affected
- rconfig/rconfig
- Source
- cve@mitre.org
EPSS moved from 57.8% on 25 October 2026 to 58.1% on 3 November 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
References
- https://gist.github.com/farid007/9f6ad063645d5b1550298c8b9ae953ffThird Party Advisory
- https://gist.github.com/farid007/9f6ad063645d5b1550298c8b9ae953ffThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.