CVE-2021-22859: The users’ data querying function of EIC e-document system does not filter the special characters which result

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CRITICAL 9.8REMOTEDOWNGRADE

CVE-2021-22859 is a critical-severity flaw (CVSS 9.8) affecting e-document system. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The users’ data querying function of EIC e-document system does not filter the special characters which resulted in remote attackers can inject SQL syntax and execute arbitrary commands without privilege.

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	3.8% (top 10%)
CISA exploited list	No
Weakness	CWE-89
Published	2021-03-17
Last modified	2026-06-17

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

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

Am I affected?

Timeline

2021-03-17 09:15 UTCPublished CVE record published
2026-06-17 03:37 UTCUpdated Record last modified

eic e-document system DOWNGRADE

Affected: 3.0.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.0.2

1. Check installed version

apt-cache policy e-document-system || rpm -q e-document-system || e-document-system --version

2. No fixed release: DOWNGRADE to a release before 3.0.2 (Debian / Ubuntu)

apt-cache madison e-document-system sudo apt install e-document-system=<VERSION_BEFORE_3.0.2> sudo apt-mark hold e-document-system

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

dnf --showduplicates list e-document-system sudo dnf downgrade e-document-system-<VERSION_BEFORE_3.0.2> sudo dnf versionlock add e-document-system

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-2021-22859?

e-document system: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-22859 being exploited?

CVE-2021-22859 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-2021-22859 affect?

CVE-2021-22859 affects e-document system. Severity is critical (CVSS 9.8). The users’ data querying function of EIC e-document system does not filter the special characters which resulted in remote attackers can inject SQL syntax and execute arbitrary commands without privilege.

How urgent is CVE-2021-22859?

Priority 62/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2021-34683 MEDIUM 5.3 DOWNGRADE An issue was discovered in EXCELLENT INFOTEK CORPORATION (EIC) E-document System 3.0
CVE-2021-22860 CRITICAL 9.8 DOWNGRADE EIC e-document system does not perform completed identity verification for sorting and filtering personnel dat

References

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