CVE-2026-8867

Published: Mag 27, 2026 Last Modified: Mag 27, 2026

ExploitDB:

Other exploit source:

Google Dorks:

MEDIUM 6,4

Source: [email protected]

Attack Vector: network

Attack Complexity: low

Privileges Required: low

User Interaction: none

Scope: changed

Confidentiality: low

Integrity: low

Availability: none

Description

AI Translation Available

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.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Stable

Abstraction: Base Structure: Simple

Common Consequences

Security Scopes Affected:

Access Control Confidentiality Integrity Availability

Potential Impacts:

Bypass Protection Mechanism Read Application Data Execute Unauthorized Code Or Commands

Applicable Platforms

Technologies: AI/ML, Web Based, Web Server

Likelihood of Exploit: High

View CWE Details

https://plugins.trac.wordpress.org/browser/post-category-ga…

https://plugins.trac.wordpress.org/browser/post-category-gallery/trunk/horcatba…