What is CVE-2021-20850?

CVE-2021-20850 is a critical-severity vulnerability in Alfasado Powercms, classified under OS Command Injection. CVSS score: 9.8/10. Published 2021-11-24.

How severe is CVE-2021-20850?

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

RCE in Alfasado Powercms

CVE-2021-20850

PowerCMS XMLRPC API of PowerCMS 5.19 and earlier, PowerCMS 4.49 and earlier, PowerCMS 3.295 and earlier, and PowerCMS 2 Series (End-of-Life, EOL) allows a remote attacker to execute an arbitrary OS command via unspecified vectors.

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.015 (71.4th percentile) — read the EPSS interpretation.

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.

Affected products

Alfasado Powercms
Alfasado Inc. Powercms Xmlrpc Api — versions PowerCMS 5.19 and earlier, PowerCMS 4.49 and earlier, PowerCMS 3.295 and earlier, PowerCMS 2 Series (End-of-Life, EOL)

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

vultures@jpcert.or.jp (Patch, x_refsource_MISC, Vendor Advisory)
vultures@jpcert.or.jp (Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-20850?: CVE-2021-20850 is a critical-severity vulnerability in Alfasado Powercms, classified under OS Command Injection. CVSS score: 9.8/10. Published 2021-11-24.
How severe is CVE-2021-20850?: Critical severity. CVSS v3 base score is 9.8 out of 10.