CVE-2023-34738: Chemex through 3.7.1 is vulnerable to arbitrary file upload.

Q: How do I fix CVE-2023-34738?

chemex: upgrade to newer than 3.7.1. Exact commands for each OS are on this page.

Q: Is CVE-2023-34738 being exploited?

CVE-2023-34738 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-34738 affect?

CVE-2023-34738 affects chemex. Severity is critical (CVSS 9.8). Chemex through 3.7.1 is vulnerable to arbitrary file upload.

Q: How urgent is CVE-2023-34738?

Priority 58/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2023-34738 is a critical-severity flaw (CVSS 9.8) affecting chemex. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Chemex through 3.7.1 is vulnerable to arbitrary file upload.

Why this priority

Critical severity
Public exploit reference
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	0.8% (top 44%)
CISA exploited list	No
Weakness	CWE-434
Published	2023-06-29
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: chemex

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

Am I affected?

Timeline

2023-06-29 00:15 UTCPublished CVE record published
2026-06-17 06:03 UTCUpdated Record last modified

chemex chemex UPGRADE

Affected: <= 3.7.1

Fixed in: newer than 3.7.1

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 3.7.1 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade chemex

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2023-34738?

chemex: upgrade to newer than 3.7.1. Exact commands for each OS are on this page.

Is CVE-2023-34738 being exploited?

CVE-2023-34738 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-2023-34738 affect?

CVE-2023-34738 affects chemex. Severity is critical (CVSS 9.8). Chemex through 3.7.1 is vulnerable to arbitrary file upload.

How urgent is CVE-2023-34738?

Priority 58/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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