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 CompromiseGet alerts for future matching vulnerabilitiesLog in to subscribe
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)
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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IV. Related Vulnerabilities
Same weakness: CWE-79
- CVE-2026-46426
Budibase: Unrestricted Upload of File with Dangerous Type - CVE-2026-48149
Budibase: Stored XSS in Text component: BASIC users execute - CVE-2026-49044
WordPress Advanced Custom Fields: Font Awesome Field plugin - CVE-2026-49102
Webmin <2.640 XSS漏洞 - CVE-2026-47119
Agent Zero < 1.15 Stored XSS via image_get API Endpoint
V. Comments for CVE-2026-8867
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