What is CVE-2021-31324?

CVE-2021-31324 is a critical-severity vulnerability in Control-Webpanel Webpanel, classified under OS Command Injection. CVSS score: 9.8/10. Published 2021-05-18.

How severe is CVE-2021-31324?

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

Is CVE-2021-31324 known to be exploited?

3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

RCE in Control-Webpanel Webpanel

CVE-2021-31324

The unprivileged user portal part of CentOS Web Panel is affected by a Command Injection vulnerability leading to root Remote Code Execution.

Vulnerability class: Command Injection (OS Command Injection)

Published 2021-05-18 · 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: 0.346 (98.4th percentile), scored 2026-10-03.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 98.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.341 · newest: 0.346 · change: +0.006

Affected products

Control-Webpanel Webpanel

Weakness classification (CWE)

CWE-78 — OS Command Injection

Public proof-of-concept exploits

References

www.shielder.it/advisories/centos-web-panel-idsession-root-rce/ (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-31324?: CVE-2021-31324 is a critical-severity vulnerability in Control-Webpanel Webpanel, classified under OS Command Injection. CVSS score: 9.8/10. Published 2021-05-18.
How severe is CVE-2021-31324?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2021-31324 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.