CVE-2026-2021
Deferred Deferred - Pending Action

Stored XSS in Slideshow Gallery LITE WordPress Plugin

Publication date: 2026-06-18

Last updated on: 2026-06-18

Assigner: Wordfence

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.

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Meta Information

Published
2026-06-18
Last Modified
2026-06-18
Generated
2026-07-09
AI Q&A
2026-06-18
EPSS Evaluated
2026-07-08
NVD
CVE-2026-2021
EUVD
EUVD-2026-37868

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
slideshow_gallery slideshow_gallery_lite to 1.8.5 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Attack-Flow Graph

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Executive Summary

The Slideshow Gallery LITE plugin for WordPress has a Stored Cross-Site Scripting (XSS) vulnerability in the 'alwaysauto' shortcode attribute in all versions up to and including 1.8.5.

This vulnerability arises because the plugin does not properly sanitize or escape user-supplied input for this attribute.

As a result, authenticated users with Contributor-level access or higher can inject malicious scripts into pages, which will execute whenever any user views those pages.

Impact Analysis

This vulnerability allows attackers with Contributor-level access or above to inject arbitrary web scripts into pages.

These scripts execute in the context of users who visit the affected pages, potentially leading to theft of user credentials, session hijacking, or other malicious actions.

Because the attack is stored, the malicious script persists and affects all users who access the injected content.

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