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 attack may be launched remotely. The exploit has been released to the public and may be used for attacks.

EPSS: 0.003 (21.3th 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

cna@vuldb.com (technical-description, vdb-entry)
cna@vuldb.com (signature, permissions-required)
cna@vuldb.com (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.