CVE-2026-8867
6.4 MEDIUMThe Post Category Gallery plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'postcategorygallery' shortc...
Published: 2026-05-27 · Last updated: 2026-05-27
Severity and scoring
- CVSS
- 6.4 MEDIUM
- Vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
- CWE
- CWE-79
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
References
- [NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-8867
- [Other]https://plugins.trac.wordpress.org/browser/post-category-gallery/trunk/horcatbar.php#L79
- [Other]https://plugins.trac.wordpress.org/browser/post-category-gallery/trunk/horcatbar.php#L97
- [Other]https://www.wordfence.com/threat-intel/vulnerabilities/id/f439718e-4a3d-4dc9-a16c-6b655480dde6?source=cve
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Same CWE
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