What is CVE-2020-10221?

CVE-2020-10221 is a high-severity vulnerability in Rconfig, classified under OS Command Injection. CVSS score: 8.8/10. Published 2020-03-08.

How severe is CVE-2020-10221?

High severity. CVSS v3 base score is 8.8 out of 10.

Is CVE-2020-10221 known to be exploited?

Yes. CVE-2020-10221 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 5 public proof-of-concept repositories are indexed.

RCE in Rconfig

CVE-2020-10221

lib/ajaxHandlers/ajaxAddTemplate.php in rConfig through 3.94 allows remote attackers to execute arbitrary OS commands via shell metacharacters in the fileName POST parameter.

Vulnerability class: Command Injection (OS Command Injection)

Published 2020-03-08 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.771 (99.6th percentile), scored 2026-10-18.

High probability of exploitation in the next 30 days — patch promptly. 100th percentile — 99.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.802 · newest: 0.771 · change: -0.031

Affected products

Rconfig

Weakness classification (CWE)

CWE-78 — OS Command Injection

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2021-11-03. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2022-05-03.

Required action: Apply updates per vendor instructions.

Public proof-of-concept exploits

References

cwe.mitre.org/data/definitions/78.html (Third Party Advisory)
engindemirbilek.github.io/rconfig-3.93-rce (Exploit, Third Party Advisory)
github.com/EnginDemirbilek/EnginDemirbilek.github.io/blob/master/rconfig-3.93-r… (Exploit, Third Party Advisory)
packetstormsecurity.com/files/156687/rConfig-3.93-Authenticated-Remote-Code-Exe… (Exploit, VDB Entry, Third Party Advisory)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)

Frequently asked questions

What is CVE-2020-10221?: CVE-2020-10221 is a high-severity vulnerability in Rconfig, classified under OS Command Injection. CVSS score: 8.8/10. Published 2020-03-08.
How severe is CVE-2020-10221?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2020-10221 known to be exploited?: Yes. CVE-2020-10221 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 5 public proof-of-concept repositories are indexed.