CVE-2023-34237: SABnzbd is an open source automated Usenet download tool

This month

HIGH 8.1REMOTEUPGRADE

CVE-2023-34237 is a high-severity flaw (CVSS 8.1) affecting sabnzbd. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

SABnzbd is an open source automated Usenet download tool. A design flaw was discovered in SABnzbd that could allow remote code execution. Manipulating the Parameters setting in the Notification Script functionality allows code execution with the privileges of the SABnzbd process. Exploiting the vulnerabilities requires access to the web interface. Remote exploitation is possible if users[exposed their setup to the internet or other untrusted netw

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	1.7% (top 22%)
CISA exploited list	No
Weakness	CWE-94
Published	2023-06-07
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: sabnzbd

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

Am I affected?

Timeline

2023-06-07 20:15 UTCPublished CVE record published
2026-06-17 06:03 UTCUpdated Record last modified

sabnzbd sabnzbd UPGRADE

Affected: >= 1.1.0 and < 4.0.2

Fixed in: 4.0.2

Safe to downgrade to: a release before 1.1.0

1. Check installed version

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

2. UPGRADE to 4.0.2 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade sabnzbd

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 1.1.0 (Debian / Ubuntu)

apt-cache madison sabnzbd sudo apt install sabnzbd=<VERSION_BEFORE_1.1.0> sudo apt-mark hold sabnzbd

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

dnf --showduplicates list sabnzbd sudo dnf downgrade sabnzbd-<VERSION_BEFORE_1.1.0> sudo dnf versionlock add sabnzbd

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-2023-34237?

sabnzbd: upgrade to 4.0.2. Exact commands for each OS are on this page.

Is CVE-2023-34237 being exploited?

CVE-2023-34237 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-2023-34237 affect?

CVE-2023-34237 affects sabnzbd. Severity is high (CVSS 8.1). SABnzbd is an open source automated Usenet download tool. A design flaw was discovered in SABnzbd that could allow remote code execution. Manipulating the Parameters setting in the Notification Script functionality allows code execution wit

How urgent is CVE-2023-34237?

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

References

← Back to latest CVEs