What is CVE-2020-13638?

CVE-2020-13638 is a critical-severity vulnerability in Rconfig, classified under Improper Privilege Management. CVSS score: 9.8/10. Published 2020-11-13.

How severe is CVE-2020-13638?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Privilege escalation in Rconfig

CVE-2020-13638

lib/crud/userprocess.php in rConfig 3.9.x before 3.9.7 has an authentication bypass, leading to administrator account creation. This issue has been fixed in 3.9.7.

Vulnerability class: Privilege Escalation

Published 2020-11-13 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.769 (99.5th percentile), scored 2026-10-19.

High probability of exploitation in the next 30 days — patch promptly. 100th percentile — 99.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.766 · newest: 0.769 · change: +0.003

Affected products

Rconfig

Weakness classification (CWE)

CWE-269 — Improper Privilege Management

References

theguly.github.io/2020/09/rconfig-3.9.4-multiple-vulnerabilities/ (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2020-13638?: CVE-2020-13638 is a critical-severity vulnerability in Rconfig, classified under Improper Privilege Management. CVSS score: 9.8/10. Published 2020-11-13.
How severe is CVE-2020-13638?: Critical severity. CVSS v3 base score is 9.8 out of 10.