CVE-2026-8867
No known patch is available for this vulnerability.
The affected plugin has been removed from the WordPress.org directory, and no patched version is being distributed through the official directory. If you have the affected software installed, you should uninstall or replace it rather than wait for an update.
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
2<=1.0.0+ 1 more
- (no CPE)range: <=1.0.0
- (no CPE)range: <=1.0.0
Patches
Vulnerability mechanics
References
3News mentions
1- Wordfence Intelligence Weekly WordPress Vulnerability Report (May 25, 2026 to May 31, 2026)Wordfence Blog · Jun 4, 2026