Medium severity6.4NVD Advisory· Published Jun 18, 2026· Updated Jun 18, 2026
CVE-2026-2021
CVE-2026-2021
Description
The Slideshow Gallery LITE plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'alwaysauto' shortcode attribute in all versions up to, and including, 1.8.5. This is due to insufficient input sanitization and output escaping on user-supplied attributes. 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
1- Range: <=1.8.5
Patches
Vulnerability mechanics
References
6- plugins.trac.wordpress.org/browser/slideshow-gallery/tags/1.8.5/slideshow-gallery.phpnvd
- plugins.trac.wordpress.org/browser/slideshow-gallery/tags/1.8.5/views/default/gallery.phpnvd
- plugins.trac.wordpress.org/browser/slideshow-gallery/trunk/slideshow-gallery.phpnvd
- plugins.trac.wordpress.org/browser/slideshow-gallery/trunk/views/default/gallery.phpnvd
- plugins.trac.wordpress.org/changesetnvd
- www.wordfence.com/threat-intel/vulnerabilities/id/55d842fc-a750-4b59-a1d6-b3bd427dfe79nvd
News mentions
2- Wordfence Intelligence Weekly WordPress Vulnerability Report (June 15, 2026 to June 21, 2026)Wordfence Blog · Jun 25, 2026
- 25 WordPress Plugin CVEs Drop in Two Days: Critical File Deletion, SSRF, and XSS Lead the BatchVypr Intelligence · Jun 19, 2026