What is CVE-2020-27466?

CVE-2020-27466 is a high-severity vulnerability in Rconfig, classified under Missing Authorization. CVSS score: 7.8/10. Published 2021-08-20.

How severe is CVE-2020-27466?

High severity. CVSS v3 base score is 7.8 out of 10.

Auth bypass in Rconfig

CVE-2020-27466

An arbitrary file write vulnerability in lib/AjaxHandlers/ajaxEditTemplate.php of rConfig 3.9.6 allows attackers to execute arbitrary code via a crafted file.

Vulnerability class: Broken Access Control

Published 2021-08-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.019 (78.8th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 79th percentile — 78.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.019 · newest: 0.019 · change: 0.000

Affected products

Rconfig — versions 3.9.6

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

ssd-disclosure.com/ssd-advisory-rconfig-unauthenticated-rce/ (Third Party Advisory)

Frequently asked questions

What is CVE-2020-27466?: CVE-2020-27466 is a high-severity vulnerability in Rconfig, classified under Missing Authorization. CVSS score: 7.8/10. Published 2021-08-20.
How severe is CVE-2020-27466?: High severity. CVSS v3 base score is 7.8 out of 10.