What is CVE-2026-6555?

CVE-2026-6555 is a critical-severity vulnerability in Prosolution Wp Client, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2026-05-20.

How severe is CVE-2026-6555?

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

Arbitrary file upload in Prosolution Wp Client

CVE-2026-6555

The ProSolution WP Client plugin for WordPress is vulnerable to Arbitrary File Upload in versions up to, and including, 2.0.0. This is due to an array validation mismatch where only the first file in the upload array undergoes extension an…

Vulnerability class: Unrestricted File Upload

EPSS: 0.004 (58.0th percentile) — read the EPSS interpretation.

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.

Affected products

Prosolution Wp Client — versions 0

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

Frequently asked questions

What is CVE-2026-6555?: CVE-2026-6555 is a critical-severity vulnerability in Prosolution Wp Client, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2026-05-20.
How severe is CVE-2026-6555?: Critical severity. CVSS v3 base score is 9.8 out of 10.