CVE-2021-43359: Sunnet eHRD has broken access control vulnerability, which allows a remote attacker to access account manageme

This month

HIGH 8.8DOWNGRADE

CVE-2021-43359 is a high-severity flaw (CVSS 8.8) affecting ehrd. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Sunnet eHRD has broken access control vulnerability, which allows a remote attacker to access account management page after being authenticated as a general user, then perform privilege escalation to execute arbitrary code and control the system or interrupt services.

Why this priority

High severity

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

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	2.5% (top 15%)
CISA exploited list	No
Weakness	CWE-732
Published	2021-12-01
Last modified	2026-06-17

Publisher (CNA): TWCERT/CC · Vendor: sun

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

Am I affected?

Timeline

2021-12-01 02:15 UTCPublished CVE record published
2026-06-17 04:10 UTCUpdated Record last modified

sun ehrd DOWNGRADE

Affected: 8 · 9

Fixed in: no fixed release known

Safe to downgrade to: a release before 8

1. Check installed version

apt-cache policy ehrd || rpm -q ehrd || ehrd --version

2. No fixed release: DOWNGRADE to a release before 8 (Debian / Ubuntu)

apt-cache madison ehrd sudo apt install ehrd=<VERSION_BEFORE_8> sudo apt-mark hold ehrd

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

dnf --showduplicates list ehrd sudo dnf downgrade ehrd-<VERSION_BEFORE_8> sudo dnf versionlock add ehrd

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-2021-43359?

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

Is CVE-2021-43359 being exploited?

CVE-2021-43359 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-2021-43359 affect?

CVE-2021-43359 affects ehrd. Severity is high (CVSS 8.8). Sunnet eHRD has broken access control vulnerability, which allows a remote attacker to access account management page after being authenticated as a general user, then perform privilege escalation to execute arbitrary code and control the s

How urgent is CVE-2021-43359?

Priority 52/100. High severity

Related CVEs

CVE-2021-43360 HIGH 8.8 DOWNGRADE Sunnet eHRD e-mail delivery task schedule’s serialization function has inadequate input object validation and
CVE-2021-43358 HIGH 7.5 DOWNGRADE Sunnet eHRD has inadequate filtering for special characters in URLs, which allows a remote attacker to perform
CVE-2020-10510 HIGH 8.1 DOWNGRADE Sunnet eHRD, a human training and development management system, contains a vulnerability of Broken Access Con
CVE-2020-10509 MEDIUM 6.1 DOWNGRADE Sunnet eHRD, a human training and development management system, contains vulnerability of Cross-Site Scriptin
CVE-2020-10508 HIGH 7.5 DOWNGRADE Sunnet eHRD, a human training and development management system, improperly stores system files

References

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