What is CVE-2023-30333?

CVE-2023-30333 is a critical-severity vulnerability in Perfree Perfreeblog, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2023-05-18.

How severe is CVE-2023-30333?

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

Is CVE-2023-30333 known to be exploited?

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

Arbitrary file upload in Perfree Perfreeblog

CVE-2023-30333

An arbitrary file upload vulnerability in the component /admin/ThemeController.java of PerfreeBlog v3.1.2 allows attackers to execute arbitrary code via a crafted file.

Vulnerability class: Unrestricted File Upload

Published 2023-05-18 · 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: 0.009 (59.2th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 59.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Perfree Perfreeblog — versions 3.1.2

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

Public proof-of-concept exploits

References

github.com/j0k1rr/some-automated-script/issues/3 (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2023-30333?: CVE-2023-30333 is a critical-severity vulnerability in Perfree Perfreeblog, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2023-05-18.
How severe is CVE-2023-30333?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2023-30333 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.