CVE-2026-5293 json
診断ジェネレータ作成プラグイン <= 1.4.16 - Authenticated (Subscriber+) Stored Cross-Site Scripting via 'js' Parameter
published 2026-05-20 5 mo ago modified 2026-07-24 3 mo ago also EUVD-2026-31034
- cvss
- 6.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 23%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 5 mo ago
Exploit prediction
0.31% chance of exploitation in the next 30 days, higher than 23% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
Affected products
- olivesystem 診断ジェネレータ作成プラグイン
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/c5293c0f-90b0-41df-a623-90297d998c41?source=cve
- plugins.trac.wordpress.org /browser/os-diagnosis-generator/trunk/diagnosisAdminClass.php#L409
- plugins.trac.wordpress.org /browser/os-diagnosis-generator/tags/1.4.16/diagnosisAdminClass.php#L409
- plugins.trac.wordpress.org /browser/os-diagnosis-generator/trunk/class/themeClass.php#L26
- plugins.trac.wordpress.org /browser/os-diagnosis-generator/tags/1.4.16/class/themeClass.php#L26
- plugins.trac.wordpress.org /browser/os-diagnosis-generator/trunk/class/themeClass.php#L39
- plugins.trac.wordpress.org /browser/os-diagnosis-generator/tags/1.4.16/class/themeClass.php#L39
- plugins.trac.wordpress.org /browser/os-diagnosis-generator/trunk/include_files/user-viewFormPage.php#L102
- plugins.trac.wordpress.org /browser/os-diagnosis-generator/tags/1.4.16/include_files/user-viewFormPage.php#L102
Sources
- CVE List CVE-2026-5293
- NVD CVE-2026-5293
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.