CVE-2023-45899: An issue in the component SuperUserSetuserModuleFrontController:init() of idnovate superuser before v2.4.2 all

This week

HIGH 7.5REMOTEUPGRADE

CVE-2023-45899 is a high-severity flaw (CVSS 7.5) affecting superuser. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue in the component SuperUserSetuserModuleFrontController:init() of idnovate superuser before v2.4.2 allows attackers to bypass authentication via a crafted HTTP call.

Why this priority

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

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.8% (top 43%)
CISA exploited list	No
Weakness	CWE-863
Published	2023-10-31
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: idnovate

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

Am I affected?

Timeline

2023-10-31 02:15 UTCPublished CVE record published
2026-06-17 06:29 UTCUpdated Record last modified

idnovate superuser UPGRADE

Affected: >= 2.3.5 and < 2.4.2

Fixed in: 2.4.2

Safe to downgrade to: a release before 2.3.5

1. Check installed version

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

2. UPGRADE to 2.4.2 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade superuser

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 2.3.5 (Debian / Ubuntu)

apt-cache madison superuser sudo apt install superuser=<VERSION_BEFORE_2.3.5> sudo apt-mark hold superuser

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

dnf --showduplicates list superuser sudo dnf downgrade superuser-<VERSION_BEFORE_2.3.5> sudo dnf versionlock add superuser

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-2023-45899?

superuser: upgrade to 2.4.2. Exact commands for each OS are on this page.

Is CVE-2023-45899 being exploited?

CVE-2023-45899 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-2023-45899 affect?

CVE-2023-45899 affects superuser. Severity is high (CVSS 7.5). An issue in the component SuperUserSetuserModuleFrontController:init() of idnovate superuser before v2.4.2 allows attackers to bypass authentication via a crafted HTTP call.

How urgent is CVE-2023-45899?

Priority 51/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

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References

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