TI-2026-78922 Aliases CVE-2026-112868 GHSA-vc4c-mh3j-3h84

Authorization bypass in WordPress H5P plugin

LOW 20CWE-639Published 2026-10-21 · Updated 2026-10-22

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: None · Low · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-639.

Summary

The H5P plugin for WordPress through 1.17.9 contains an authorization bypass through a user-controlled key (CWE-639). The plugin trusts an identifier supplied by the user to select a resource, so the access check can be circumvented. An authenticated user with low privileges can change data they should not be able to modify, with low integrity impact and no confidentiality or availability impact.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

Authorization Bypass Through User-Controlled Key vulnerability in H5P H5P h5p allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects H5P: from n/a through 1.17.9.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00274 19th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
H5P	H5P	up to 1.17.9	—	No fix listed	CNA

H5P VendorH5P Affected up to 1.17.9 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for H5P.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Timeline

2026-10-21 Threatist record created from CVE-2026-112868
2026-10-21 Alias added: GHSA-vc4c-mh3j-3h84
2026-10-22 CISA SSVC decision points changed

References

Other 1

https://patchstack.com/database/wordpress/plugin/h5p/vulnerability/wordpress-h5p-plugin-1-17-9-insecure-direct-object-references-idor-vulnerability?_s_id=cve

TI-2024-02913 H5P < 1.15.8 - Contributor+ Stored XSS CVSS 3.1HIGH 7.1
TI-2026-40401 WordPress H5P plugin <= 1.17.6 - Reflected Cross Site Scripting (XSS) vulnerability CVSS 3.1HIGH 7.1
TI-2026-79207 Stored cross-site scripting in WordPress H5P plugin CVSS 3.1MEDIUM 6.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences