CVE-2026-8867

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.

CVSS v3 6.4 MEDIUM

6.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.1 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://plugins.trac.wordpress.org/browser/post-category-gallery/trunk/horcatbar.php#L79
https://plugins.trac.wordpress.org/browser/post-category-gallery/trunk/horcatbar.php#L97
https://www.wordfence.com/threat-intel/vulnerabilities/id/f439718e-4a3d-4dc9-a16c-6b655480dde6?source=cve

Configurations

No configuration.

History

27 May 2026, 07:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-27 07:16

Updated : 2026-06-17 11:04

NVD link : CVE-2026-8867

Mitre link : CVE-2026-8867

CVE.ORG link : CVE-2026-8867

JSON object : View

Products Affected

No product.

CWE

CWE-79

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

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