Vulnerability 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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://plugins.trac.wordpress.org/browser/slideshow-gallery/tags/1.8.5/slidesho
- https://plugins.trac.wordpress.org/browser/slideshow-gallery/tags/1.8.5/views/de
- https://plugins.trac.wordpress.org/browser/slideshow-gallery/trunk/slideshow-gal
- https://plugins.trac.wordpress.org/browser/slideshow-gallery/trunk/views/default
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old
- https://www.wordfence.com/threat-intel/vulnerabilities/id/55d842fc-a750-4b59-a1d
FAQ
What is CVE-2026-2021?
CVE-2026-2021 is a vulnerability with a CVSS score of 6.4 (MEDIUM). 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 insuff...
How severe is CVE-2026-2021?
CVE-2026-2021 has been rated MEDIUM with a CVSS base score of 6.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-2021?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.