---
id: "CVE-2026-115955"
kind: "vulnerability"
aliases: ["CVE-2026-115955"]
title: "WordPress Advanced Post Block plugin: stored XSS via post grid block"
severity: "medium"
cvss: 6.5
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["package", "wordpress", "wordpress-plugin"]
not_affected_if: ["plugin-not-installed"]
published_at: "2026-10-26T11:16:36+00:00"
first_seen_at: "2026-10-26T11:29:40+00:00"
updated_at: "2026-10-26T11:31:04+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-115955", "first_seen_at": "2026-10-26T11:29:40+00:00"}]
---

# WordPress Advanced Post Block plugin: stored XSS via post grid block

The Advanced Post Block - Post Grid plugin for the WordPress block editor does not neutralize input when generating web pages, enabling stored cross-site scripting. An attacker who can store content that the plugin renders can run JavaScript in the browsers of visitors or editors.

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

## How to check

- Check the installed plugin version in the WordPress admin under Plugins, or with `wp plugin get advanced-post-block --field=version`
- Confirm whether the site uses the Advanced Post Block post grid block on pages or posts

## Fix

- Update Advanced Post Block - Post Grid to a version later than `2.5.1`
- unknown: the sources do not name the first fixed version

## Timeline

- 2026-10-26T11:29:40+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-115955

## From the sources

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in bPlugins Advanced Post Block - Post Grid for WordPress block editor advanced-post-block allows Stored XSS.This issue affects Advanced Post Block - Post Grid for WordPress block editor: from n/a through 2.5.1.

---

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