CVE-2023-23192: IS Decisions UserLock MFA 11.01 is vulnerable to authentication bypass using scheduled task.

This month

HIGH 7.2DOWNGRADE

CVE-2023-23192 is a high-severity flaw (CVSS 7.2) affecting userlock. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

IS Decisions UserLock MFA 11.01 is vulnerable to authentication bypass using scheduled task.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	7.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	1.5% (top 26%)
CISA exploited list	No
Weakness	CWE-863
Published	2023-03-23
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: isdecisions

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

Am I affected?

Timeline

2023-03-23 02:15 UTCPublished CVE record published
2026-06-17 05:36 UTCUpdated Record last modified

isdecisions userlock DOWNGRADE

Affected: 11.0.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 11.0.1

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 11.0.1 (Debian / Ubuntu)

apt-cache madison userlock sudo apt install userlock=<VERSION_BEFORE_11.0.1> sudo apt-mark hold userlock

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

dnf --showduplicates list userlock sudo dnf downgrade userlock-<VERSION_BEFORE_11.0.1> sudo dnf versionlock add userlock

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-2023-23192?

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

Is CVE-2023-23192 being exploited?

CVE-2023-23192 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-2023-23192 affect?

CVE-2023-23192 affects userlock. Severity is high (CVSS 7.2). IS Decisions UserLock MFA 11.01 is vulnerable to authentication bypass using scheduled task.

How urgent is CVE-2023-23192?

Priority 49/100. High severity; Public exploit reference

References

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