Vulnary
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Critical· 9.8

CVE-2026-6555

The ProSolution WP Client plugin for WordPress allows unauthenticated users to upload arbitrary files. By sending a valid first file followed by a malicious PHP file, an attacker can place code in a web‑accessible directory and run it. This can lead to full control of the site.

publishedMay 20, 2026
last modifiedJul 24, 2026
sourcesNVD
severity · cvss
9.8
critical · how bad it is
exploitation · epss
<1%
59th percentile · chance of exploitation in 30 days
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →
auto-deletes from the system
counting…on Sep 7, 2026

No official fix yet. If none appears within 45 days of first tracking, this entry is removed automatically.

01

Who is affected

WordPress sites using the ProSolution WP Client plugin, versions 2.0.0 and earlier.

02

Real-world impact

An attacker can upload a PHP file that the server will execute, giving the attacker the ability to run arbitrary code on the web server, steal data, deface the site, or use the server for further attacks.

03

Why this severity

The CVSS score of 9.8 reflects that the vulnerability is exploitable over the network without authentication, with no user interaction, and provides complete compromise of confidentiality, integrity, and availability.

04

What to do about it

no official fix yet

No official fix or mitigation is documented in the sources yet. Monitor the vendor advisory and apply the patch as soon as it is released.

No fix documented in sources

05

Timeline

  1. May 20, 2026 · May 20, 2026
    Published
    Disclosed and added to the National Vulnerability Database.
  2. Jul 24, 2026 · 12d ago
    Advisory updated
    The NVD record was last revised.
06

How it’s attacked

Attack vectorNetwork (remote)
Attack complexityLow
Privileges requiredNone
User interactionNone needed
ScopeUnchanged
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
07

References & advisories

NVD advisory ↗Search advisories ↗
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →