---
id: "CVE-2026-116400"
kind: "vulnerability"
aliases: ["CVE-2026-116400"]
title: "Button Block WordPress plugin: stored XSS through versions 1.2.7"
severity: "medium"
cvss: 6.5
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["bplugins", "package", "self-hosted", "wordpress"]
not_affected_if: ["no-untrusted-contributors", "plugin-not-installed"]
published_at: "2026-10-26T18:17:44+00:00"
first_seen_at: "2026-10-26T18:31:44+00:00"
updated_at: "2026-10-26T18:33:55+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-116400", "first_seen_at": "2026-10-26T18:31:44+00:00"}]
---

# Button Block WordPress plugin: stored XSS through versions 1.2.7

The bPlugins Button Block plugin for WordPress does not neutralize input when generating web pages, enabling stored cross-site scripting. An attacker who can store content in the plugin's block output can run scripts in other users' browsers.

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

## How to check

- Check the installed version of the Button Block plugin (`button-block`) in the WordPress admin plugins list or `wp plugin get button-block --field=version`
- Confirm whether any page or post uses the Button Block block

## Fix

- Update Button Block (`button-block`) to a version later than `1.2.7`, once the vendor publishes a fixed release; the sources do not name it
- Until fixed, deactivate the plugin or restrict contributor roles that can add blocks

## Timeline

- 2026-10-26T18:31:44+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-116400

## From the sources

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in bPlugins Button Block button-block allows Stored XSS.This issue affects Button Block: from n/a through 1.2.7.

---

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