What is CVE-2021-22855?

CVE-2021-22855 is a critical-severity vulnerability in Hr Portal Project, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2021-02-17.

How severe is CVE-2021-22855?

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

Deserialization in Hr Portal Project

CVE-2021-22855

The specific function of HR Portal of Soar Cloud System accepts any type of object to be deserialized. Attackers can send malicious serialized objects to execute arbitrary commands.

Vulnerability class: Insecure Deserialization

Published 2021-02-17 · 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: 0.020 (80.4th percentile), scored 2026-10-03.

Low probability of exploitation in the next 30 days, but still tracked. 80th percentile — 80.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.020 · newest: 0.020 · change: +0.001

Affected products

Hr Portal Project — versions 7.3.2020.1013
Soar Cloud System Co., Ltd. Hr Portal — versions 0 7.3.2020.1013

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

www.twcert.org.tw/tw/cp-132-4405-2ddde-1.html (Third Party Advisory)
www.chtsecurity.com/news/d334641f-2b28-4eab-a5ed-c6ec6740557e (Third Party Advisory)

Frequently asked questions

What is CVE-2021-22855?: CVE-2021-22855 is a critical-severity vulnerability in Hr Portal Project, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2021-02-17.
How severe is CVE-2021-22855?: Critical severity. CVSS v3 base score is 9.8 out of 10.