CVE-2021-22855: The specific function of HR Portal of Soar Cloud System accepts any type of object to be deserialized

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2021-22855 is a critical-severity flaw (CVSS 9.8) affecting hr portal. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.0% (top 19%)
CISA exploited list	No
Weakness	CWE-502
Published	2021-02-17
Last modified	2026-06-17

Publisher (CNA): TWCERT/CC · Vendor: hr portal project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-02-17 14:15 UTCPublished CVE record published
2026-06-17 03:37 UTCUpdated Record last modified

hr portal project hr portal DOWNGRADE

Affected: 7.3.2020.1013

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.3.2020.1013

1. Check installed version

apt-cache policy hr-portal || rpm -q hr-portal || hr-portal --version

2. No fixed release: DOWNGRADE to a release before 7.3.2020.1013 (Debian / Ubuntu)

apt-cache madison hr-portal sudo apt install hr-portal=<VERSION_BEFORE_7.3.2020.1013> sudo apt-mark hold hr-portal

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list hr-portal sudo dnf downgrade hr-portal-<VERSION_BEFORE_7.3.2020.1013> sudo dnf versionlock add hr-portal

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-22855?

hr portal: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-22855 being exploited?

CVE-2021-22855 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-22855 affect?

CVE-2021-22855 affects hr portal. Severity is critical (CVSS 9.8). 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.

How urgent is CVE-2021-22855?

Priority 60/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2025-5192 HIGH 7.5 UPGRADE A missing authentication for critical function vulnerability in the client application of Soar Cloud HRD Human
CVE-2025-48784 HIGH 7.5 UPGRADE A missing authorization vulnerability in Soar Cloud HRD Human Resource Management System through version 7.3.2
CVE-2025-48783 HIGH 7.5 UPGRADE An external control of file name or path vulnerability in the delete file function of Soar Cloud HRD Human Res
CVE-2025-48782 CRITICAL 9.8 UPGRADE An unrestricted upload of file with dangerous type vulnerability in the upload file function of Soar Cloud HRD
CVE-2025-48781 HIGH 7.5 UPGRADE An external control of file name or path vulnerability in the download file function of Soar Cloud HRD Human R

References

← Back to latest CVEs