CVE-2026-8867— Post Categories Gallery <= 1.0.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode Attributes
Possible ATT&CK Techniques 3AI
T1505.003 · Web Shell T1059 · Command and Scripting Interpreter T1189 · Drive-by CompromiseAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| fides-it | Post Categories Gallery | ≤ 1.0.0 | affected |
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I. Basic Information for CVE-2026-8867
Vulnerability Information
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Vulnerability Title
Post Categories Gallery <= 1.0.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode Attributes
Source: NVD (National Vulnerability Database)
Vulnerability Description
The Post Category Gallery plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'postcategorygallery' shortcode in versions up to, and including, 1.0.0. This is due to insufficient input sanitization and output escaping on user-supplied shortcode attributes (such as total_width, color_scheme, and caption_font_size) inside the sc_horcatbar() function, which are concatenated directly into HTML attribute values. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: NVD (National Vulnerability Database)
Vulnerability Title
WordPress plugin Post Category Gallery 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin Post Category Gallery 1.0.0及之前版本存在跨站脚本漏洞，该漏洞源于对postcategorygallery短代码中total_width、color_scheme和caption_font_
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| fides-it | Post Categories Gallery | 0 ~ 1.0.0 | - |
II. Public POCs for CVE-2026-8867
| # | POC Description | Source Link | Shenlong Link |
|---|
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No public POC found.
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IV. Related Vulnerabilities
Same weakness: CWE-79
- CVE-2026-10289
code-projects Hotel and Tourism Reservation System tour.php - CVE-2026-24751
Kiteworks Secure Data Forms Vulnerable to Cross-site Scripti - CVE-2026-42676
WordPress myCred plugin <= 3.0.4 - Cross Site Scripting (XSS - CVE-2026-42678
WordPress GiveWP plugin <= 4.14.5 - Cross Site Scripting (XS - CVE-2026-42681
WordPress e2pdf plugin <= 1.32.14 - Reflected Cross Site Scr
V. Comments for CVE-2026-8867
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