What is CVE-2023-39970?

CVE-2023-39970 is a critical-severity vulnerability in Acyba Acymailing Starter, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2023-08-17.

How severe is CVE-2023-39970?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Arbitrary file upload in Acyba Acymailing Starter

CVE-2023-39970

Unrestricted Upload of File with Dangerous Type vulnerability in AcyMailing component for Joomla. It allows remote code execution.

Vulnerability class: Unrestricted File Upload

Published 2023-08-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.011 (63.3th percentile), scored 2026-10-08.

Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 63.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Acyba Acymailing Starter
Acymailing.com Acymailing Component For Joomla — versions 6.7.0-8.5.0

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

extensions.joomla.org/extension/acymailing-starter/ (Product, product)

Frequently asked questions

What is CVE-2023-39970?: CVE-2023-39970 is a critical-severity vulnerability in Acyba Acymailing Starter, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2023-08-17.
How severe is CVE-2023-39970?: Critical severity. CVSS v3 base score is 9.8 out of 10.