What is CVE-2020-35442?

CVE-2020-35442 is a critical-severity vulnerability in Fangfa Fdcms, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2021-06-02.

How severe is CVE-2020-35442?

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

Arbitrary file upload in Fangfa Fdcms

CVE-2020-35442

FDCMS (also known as Fangfa Content Management System) 4.0 allows remote attackers to get a webshell in the background via Front/lib/Action/FindexAction.class.php.

Vulnerability class: Unrestricted File Upload

Published 2021-06-02 · 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: 0.017 (76.1th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 76.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: 0.000

Affected products

Fangfa Fdcms — versions 4.0

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

www.ttk7.cn/post-142.html (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2020-35442?: CVE-2020-35442 is a critical-severity vulnerability in Fangfa Fdcms, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2021-06-02.
How severe is CVE-2020-35442?: Critical severity. CVSS v3 base score is 9.8 out of 10.