What is CVE-2026-4509?

CVE-2026-4509 is a medium-severity vulnerability in Pbootcms, classified under CWE-183. CVSS score: 6.3/10. Published 2026-03-21.

How severe is CVE-2026-4509?

Medium severity. CVSS v3 base score is 6.3 out of 10.

Vulnerability in Pbootcms

CVE-2026-4509

A security flaw has been discovered in PbootCMS up to 3.2.12. This affects an unknown function of the file core/function/file.php of the component File Upload. The manipulation of the argument black results in incomplete blacklist. The att…

EPSS: 0.001 (22.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.

Affected products

N/a Pbootcms — versions 3.2.0, 3.2.1, 3.2.2

Weakness classification (CWE)

References

VDB-352075 | PbootCMS File Upload file.php incomplete blacklist (technical-description, vdb-entry)
VDB-352075 | CTI Indicators (IOB, IOC, TTP, IOA) (signature, permissions-required)
Submit #773901 | 翱云科技 PbootCMS 3.2.12 Incomplete Identification of Uploaded File Variables (third-party-advisory)
cna@vuldb.com (exploit)

Frequently asked questions

What is CVE-2026-4509?: CVE-2026-4509 is a medium-severity vulnerability in Pbootcms, classified under CWE-183. CVSS score: 6.3/10. Published 2026-03-21.
How severe is CVE-2026-4509?: Medium severity. CVSS v3 base score is 6.3 out of 10.