CVE-2025-45731: A group deletion race condition in 2FAuth v5.5.0 causes data inconsistencies and orphaned accounts when a grou

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MEDIUM 6.5REMOTEDOWNGRADE

CVE-2025-45731 is a medium-severity flaw (CVSS 6.5) affecting 2fauth. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A group deletion race condition in 2FAuth v5.5.0 causes data inconsistencies and orphaned accounts when a group is deleted while other operations are pending.

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 73%)
CISA exploited list	No
Weakness	CWE-362
Published	2025-07-24
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: 2fauth

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

Am I affected?

Timeline

2025-07-24 14:15 UTCPublished CVE record published
2026-06-17 09:25 UTCUpdated Record last modified

2fauth 2fauth DOWNGRADE

Affected: 5.4.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.4.3

1. Check installed version

apt-cache policy 2fauth || rpm -q 2fauth || 2fauth --version

2. No fixed release: DOWNGRADE to a release before 5.4.3 (Debian / Ubuntu)

apt-cache madison 2fauth sudo apt install 2fauth=<VERSION_BEFORE_5.4.3> sudo apt-mark hold 2fauth

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

dnf --showduplicates list 2fauth sudo dnf downgrade 2fauth-<VERSION_BEFORE_5.4.3> sudo dnf versionlock add 2fauth

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-2025-45731?

2fauth: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-45731 being exploited?

CVE-2025-45731 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-2025-45731 affect?

CVE-2025-45731 affects 2fauth. Severity is medium (CVSS 6.5). A group deletion race condition in 2FAuth v5.5.0 causes data inconsistencies and orphaned accounts when a group is deleted while other operations are pending.

How urgent is CVE-2025-45731?

Priority 40/100. Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2024-52598 HIGH 7.5 UPGRADE 2FAuth is a web app to manage Two-Factor Authentication (2FA) accounts and generate their security codes
CVE-2024-52597 MEDIUM 6.1 UPGRADE 2FAuth is a web app to manage Two-Factor Authentication (2FA) accounts and generate their security codes

References

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