How severe is CVE-2023-34738?

CVE-2023-34738 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-34738 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-34738?

CVE-2023-34738 affects Chemex. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-34738?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2023-34738 published?

CVE-2023-34738 was published on 2023-06-29 and last updated on 2026-06-17.

CVE-2023-34738

CVE-2023-34738 is a critical-severity vulnerability in Chemex with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-434.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (51st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Chemex
Published: 2023-06-29
Last modified: 2026-06-17

Description

Chemex through 3.7.1 is vulnerable to arbitrary file upload.

Frequently asked questions

What is CVE-2023-34738?: Chemex through 3.7.1 is vulnerable to arbitrary file upload.
How severe is CVE-2023-34738?: CVE-2023-34738 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-34738 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-34738?: CVE-2023-34738 affects Chemex. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-34738?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2023-34738 published?: CVE-2023-34738 was published on 2023-06-29 and last updated on 2026-06-17.

References

https://github.com/celaraze/chemex/issues/64

Affected products (1)

cpe:2.3:a:chemex:chemex:*:*:*:*:*:*:*:*

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