What is CVE-2018-20526?

CVE-2018-20526 is a critical-severity vulnerability in Roxyfileman Roxy Fileman, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2019-03-21.

How severe is CVE-2018-20526?

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

Is CVE-2018-20526 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Arbitrary file upload in Roxyfileman Roxy Fileman

CVE-2018-20526

Roxy Fileman 1.4.5 allows unrestricted file upload in upload.php.

Vulnerability class: Unrestricted File Upload

Published 2019-03-21 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.731 (99.5th percentile), scored 2026-10-18.

High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.731 · newest: 0.731 · change: 0.000

Affected products

Roxyfileman Roxy Fileman — versions 1.4.5

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

Public proof-of-concept exploits

References

packetstormsecurity.com/files/151033/Roxy-Fileman-1.4.5-File-Upload-Directory-T… (VDB Entry, Third Party Advisory)
www.exploit-db.com/exploits/46085/ (VDB Entry, Third Party Advisory, exploit)

Frequently asked questions

What is CVE-2018-20526?: CVE-2018-20526 is a critical-severity vulnerability in Roxyfileman Roxy Fileman, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2019-03-21.
How severe is CVE-2018-20526?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2018-20526 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.