CVE-2023-33740: Incorrect access control in luowice v3.5.18 allows attackers to access cloud source code information via modif

This week

HIGH 7.5REMOTEDOWNGRADE

CVE-2023-33740 is a high-severity flaw (CVSS 7.5) affecting luowice. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Incorrect access control in luowice v3.5.18 allows attackers to access cloud source code information via modification fo the Verify parameter in a warning message.

Why this priority

High severity
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	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.2% (top 32%)
CISA exploited list	No
Weakness	CWE-346
Published	2023-05-30
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: luowice

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

Am I affected?

Timeline

2023-05-30 22:15 UTCPublished CVE record published
2026-06-17 06:02 UTCUpdated Record last modified

luowice luowice DOWNGRADE

Affected: 3.5.18

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.5.18

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 3.5.18 (Debian / Ubuntu)

apt-cache madison luowice sudo apt install luowice=<VERSION_BEFORE_3.5.18> sudo apt-mark hold luowice

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

dnf --showduplicates list luowice sudo dnf downgrade luowice-<VERSION_BEFORE_3.5.18> sudo dnf versionlock add luowice

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-2023-33740?

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

Is CVE-2023-33740 being exploited?

CVE-2023-33740 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-2023-33740 affect?

CVE-2023-33740 affects luowice. Severity is high (CVSS 7.5). Incorrect access control in luowice v3.5.18 allows attackers to access cloud source code information via modification fo the Verify parameter in a warning message.

How urgent is CVE-2023-33740?

Priority 53/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2023-31677 HIGH 7.5 DOWNGRADE Insecure permissions in luowice 3.5.18 allow attackers to view information for other alarm devices via modific

References

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