What is CVE-2023-34747?

CVE-2023-34747 is a critical-severity vulnerability in Ujcms, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2023-06-14.

How severe is CVE-2023-34747?

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

Is CVE-2023-34747 known to be exploited?

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

Arbitrary file upload in Ujcms

CVE-2023-34747

File upload vulnerability in ujcms 6.0.2 via /api/backend/core/web-file-upload/upload.

Vulnerability class: Unrestricted File Upload

Published 2023-06-14 · 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: 0.200 (97.4th percentile), scored 2026-09-30.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 97.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.200 · newest: 0.200 · change: 0.000

Affected products

Ujcms — versions 6.0.2

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

Public proof-of-concept exploits

References

github.com/ujcms/ujcms/issues/4 (Exploit, Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2023-34747?: CVE-2023-34747 is a critical-severity vulnerability in Ujcms, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2023-06-14.
How severe is CVE-2023-34747?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2023-34747 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.