---
id: "CVE-2026-54855"
kind: "vulnerability"
aliases: ["CVE-2026-54855"]
title: "Profile Builder WordPress plugin: unauthenticated XSS through versions 4.0.5"
severity: "high"
cvss: 7.1
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["package", "profile-builder", "self-hosted", "wordpress"]
not_affected_if: ["plugin-not-installed"]
published_at: "2026-10-30T19:18:26+00:00"
first_seen_at: "2026-10-30T19:25:29+00:00"
updated_at: "2026-10-30T19:26:02+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-54855", "first_seen_at": "2026-10-30T19:25:29+00:00"}]
---

# Profile Builder WordPress plugin: unauthenticated XSS through versions 4.0.5

Profile Builder, a WordPress user-profile plugin, has a cross-site scripting flaw in versions up to and including 4.0.5. A visitor without an account can get script into a page that other users load, which can run in their browsers.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed Profile Builder version in the WordPress admin plugins list, or read the `Version` header in the plugin's main file.
- Compare the version against `4.0.5`; anything at or below it is in the reported range.

## Fix

- Move Profile Builder to a version later than `4.0.5`; the exact fixed version is unknown.

## Timeline

- 2026-10-30T19:25:29+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-54855

## From the sources

Unauthenticated Cross Site Scripting (XSS) in Profile Builder <= 4.0.5 versions.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_