CVE-2026-8867

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.

PUBLISHED Reserved 2026-05-18 | Published 2026-05-27 | Updated 2026-05-27 | Assigner Wordfence

Problem types

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

Timeline

Credits

Gilang Asra Bilhadi finder

References

www.wordfence.com/...-4a3d-4dc9-a16c-6b655480dde6?source=cve

plugins.trac.wordpress.org/...ry-gallery/trunk/horcatbar.php

plugins.trac.wordpress.org/...ry-gallery/trunk/horcatbar.php

cve.org (CVE-2026-8867)

nvd.nist.gov (CVE-2026-8867)

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