WordPress security changelog
MEDIUM CVE-2026-5293 Deferred

診断ジェネレータ作成プラグイン: Cross-site scripting

診断ジェネレータ作成プラグイン is affected by cross-site scripting. Exploitation requires at least subscriber-level access. Injected script can execute in the affected site's origin when the vulnerable output is viewed. The published affected range is <= 1.4.16.

CVE / CNA score 6.4 CVSS 3.1 · security@wordfence.com
NVD score Pending NVD has not published its own CVSS assessment.
Component
診断ジェネレータ作成プラグイン
Plugin slug
os-diagnosis-generator
Affected
<= 1.4.16
Safe version
> 1.4.16
Published
May 20, 2026
Weakness
CWE-79 — Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

This CVE was published May 20, 2026 and is one of 2 known issues for this plugin.

What to do

Update, patch or deactivate.

Update 診断ジェネレータ作成プラグイン to a release after 1.4.16, or disable and remove it until a fixed version is available.

A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.

Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.

Source record

Technical description

The 診断ジェネレータ作成プラグイン (Diagnosis Generator) plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'js' parameter in versions up to and including 1.4.16. This is due to missing authorization checks and insufficient input sanitization in the themeFunc() function. The function is hooked to 'admin_init' and processes theme update requests without verifying user capabilities, allowing any authenticated user (including subscribers) to save malicious JavaScript to theme files. Additionally, the save() function uses stripslashes() which removes WordPress's magic quotes protection. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in theme files that will execute whenever a user accesses a page containing the diagnosis form shortcode.

CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

References

Primary and upstream sources