CVE-2001-1483: One-Time Passwords In Everything (a.k.a OPIE) 2.32 and 2.4 allows remote attackers to determine the existence

This month

MEDIUM 5.0DOWNGRADE

CVE-2001-1483 is a medium-severity flaw (CVSS 5.0) affecting one-time passwords in everything. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

One-Time Passwords In Everything (a.k.a OPIE) 2.32 and 2.4 allows remote attackers to determine the existence of user accounts by printing random passphrases if the user account does not exist and static passphrases if the user account does exist.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	3.6% (top 11%)
CISA exploited list	No
Weakness	CWE-203
Published	2001-12-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: nrl.navy

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2001-12-31 05:00 UTCPublished CVE record published
2026-06-16 21:56 UTCUpdated Record last modified

nrl.navy one-time passwords in everything DOWNGRADE

Affected: 2.4 · 2.32

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.4

1. Check installed version

apt-cache policy one-time-passwords-in-everything || rpm -q one-time-passwords-in-everything || one-time-passwords-in-everything --version

2. No fixed release: DOWNGRADE to a release before 2.4 (Debian / Ubuntu)

apt-cache madison one-time-passwords-in-everything sudo apt install one-time-passwords-in-everything=<VERSION_BEFORE_2.4> sudo apt-mark hold one-time-passwords-in-everything

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

dnf --showduplicates list one-time-passwords-in-everything sudo dnf downgrade one-time-passwords-in-everything-<VERSION_BEFORE_2.4> sudo dnf versionlock add one-time-passwords-in-everything

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-2001-1483?

one-time passwords in everything: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2001-1483 being exploited?

CVE-2001-1483 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-2001-1483 affect?

CVE-2001-1483 affects one-time passwords in everything. Severity is medium (CVSS 5.0). One-Time Passwords In Everything (a.k.a OPIE) 2.32 and 2.4 allows remote attackers to determine the existence of user accounts by printing random passphrases if the user account does not exist and static passphrases if the user account does

How urgent is CVE-2001-1483?

Priority 40/100. No elevated risk signals yet.

References

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