CVE-2025-58386: In Terminalfour 8 through 8.4.1.1, the userLevel parameter in the user management function is not subject to p

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CRITICAL 9.8REMOTEUPGRADE

CVE-2025-58386 is a critical-severity flaw (CVSS 9.8) affecting terminalfour. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In Terminalfour 8 through 8.4.1.1, the userLevel parameter in the user management function is not subject to proper server-side authorization checks. A Power User can intercept and modify this parameter to assign the Administrator role to other existing lower-privileged accounts, or invite a new lower-privileged account and escalate its privileges. While manipulating this request, the Power User can also change the target account's password, effe

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	0.3% (top 73%)
CISA exploited list	No
Weakness	CWE-285
Published	2025-12-02
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: terminalfour

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

Am I affected?

Timeline

2025-12-02 18:15 UTCPublished CVE record published
2026-06-17 09:44 UTCUpdated Record last modified

terminalfour terminalfour UPGRADE

Affected: >= 8.0.0 and < 8.4.1.2

Fixed in: 8.4.1.2

Safe to downgrade to: a release before 8.0.0

1. Check installed version

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

2. UPGRADE to 8.4.1.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade terminalfour

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade terminalfour

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 8.0.0 (Debian / Ubuntu)

apt-cache madison terminalfour sudo apt install terminalfour=<VERSION_BEFORE_8.0.0> sudo apt-mark hold terminalfour

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

dnf --showduplicates list terminalfour sudo dnf downgrade terminalfour-<VERSION_BEFORE_8.0.0> sudo dnf versionlock add terminalfour

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-2025-58386?

terminalfour: upgrade to 8.4.1.2. Exact commands for each OS are on this page.

Is CVE-2025-58386 being exploited?

CVE-2025-58386 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-2025-58386 affect?

CVE-2025-58386 affects terminalfour. Severity is critical (CVSS 9.8). In Terminalfour 8 through 8.4.1.1, the userLevel parameter in the user management function is not subject to proper server-side authorization checks. A Power User can intercept and modify this parameter to assign the Administrator role to o

How urgent is CVE-2025-58386?

Priority 46/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2024-22217 MEDIUM 6.5 UPGRADE A Server-Side Request Forgery (SSRF) vulnerability in Terminalfour before 8.3.19 allows authenticated users to

References

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