CVE-2021-40612: An issue was discovered in Opmantek Open-AudIT after 3.5.0

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2021-40612 is a critical-severity flaw (CVSS 9.8) affecting open-audit. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in Opmantek Open-AudIT after 3.5.0. Without authentication, a vulnerability in code_igniter/application/controllers/util.php allows an attacker perform command execution without echoes.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.1% (top 19%)
CISA exploited list	No
Published	2021-12-22
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: opmantek

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

Am I affected?

Timeline

2021-12-22 13:15 UTCPublished CVE record published
2026-06-17 04:07 UTCUpdated Record last modified

opmantek open-audit UPGRADE

Affected: >= 3.5.0 and < 4.3.0

Fixed in: 4.3.0

Safe to downgrade to: a release before 3.5.0

1. Check installed version

apt-cache policy open-audit || rpm -q open-audit || open-audit --version

2. UPGRADE to 4.3.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade open-audit

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade open-audit

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 3.5.0 (Debian / Ubuntu)

apt-cache madison open-audit sudo apt install open-audit=<VERSION_BEFORE_3.5.0> sudo apt-mark hold open-audit

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list open-audit sudo dnf downgrade open-audit-<VERSION_BEFORE_3.5.0> sudo dnf versionlock add open-audit

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-2021-40612?

open-audit: upgrade to 4.3.0. Exact commands for each OS are on this page.

Is CVE-2021-40612 being exploited?

CVE-2021-40612 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-2021-40612 affect?

CVE-2021-40612 affects open-audit. Severity is critical (CVSS 9.8). An issue was discovered in Opmantek Open-AudIT after 3.5.0. Without authentication, a vulnerability in code_igniter/application/controllers/util.php allows an attacker perform command execution without echoes.

How urgent is CVE-2021-40612?

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

Software pages

PHP vulnerabilities

Related CVEs

CVE-2021-44674 MEDIUM 6.5 DOWNGRADE An information exposure issue has been discovered in Opmantek Open-AudIT 4.2.0
CVE-2021-44916 MEDIUM 6.1 UPGRADE Opmantek Open-AudIT Community 4.2.0 (Fixed in 4.3.0) is affected by a Cross Site Scripting (XSS) vulnerability
CVE-2021-3333 MEDIUM 6.1 DOWNGRADE Opmantek Open-AudIT 4.0.1 is affected by cross-site scripting (XSS)
CVE-2021-3130 MEDIUM 5.9 UPGRADE Within the Open-AudIT up to version 3.5.3 application, the web interface hides SSH secrets, Windows passwords,
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References

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