CVE-2020-12255 in the critical feed json
rConfig 3.9.4 is vulnerable to remote code execution due to improper validation in the file upload functionality.
published 2020-05-18 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-4569
- cvss
- 8.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 58.1%
- EPSS 58.1% chance of exploitation in 30 days, percentile 99%
- public exploits
- 0
- none known
Summary
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.
Exploit prediction
58.09% chance of exploitation in the next 30 days, higher than 99% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 6.5 | AV:N/AC:L/Au:S/C:P/I:P/A:P |
Classification
- Weakness
-
- CWE-434 Unrestricted Upload of File with Dangerous Type
References
-
gist.github.com
/farid007/9f6ad063645d5b1550298c8b9ae953ff
third-party-advisory
Sources
- CVE List CVE-2020-12255
- NVD CVE-2020-12255
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