Vulnerability in Social Slider Feed – Social Media Feed & Gallery Widgets — CVE-2026-121519
What to do now
Update Social Slider Feed – Social Media Feed & Gallery Widgets to 2.3.9 or later.
Affected versions
- Everything up to and including 2.3.8
Affected: Social Slider Feed – Social Media Feed & Gallery Widgets (plugin, instagram-slider-widget)
What the vulnerability is
The Social Slider Feed – Social Media Feed & Gallery Widgets plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'slidespeed' parameter in all versions up to, and including, 2.3.8 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The missing current_user_can() check in the Factory framework's connect() dispatcher allows Subscriber-level users to bypass the manage_options capability gate and both harvest a valid wis_edit_feed nonce and overwrite any feed's slidespeed setting, after which the stored payload fires on every public pageview embedding the feed shortcode.
Sources
- https://plugins.trac.wordpress.org/browser/instagram-slider-widget/tags/2.3.8/admin/pages/feeds.php#L219
- https://plugins.trac.wordpress.org/browser/instagram-slider-widget/tags/2.3.8/components/instagram/html_templates/templates/slider-overlay.php#L72
- https://plugins.trac.wordpress.org/browser/instagram-slider-widget/tags/2.3.8/components/instagram/html_templates/templates/slider.php#L67
- https://plugins.trac.wordpress.org/browser/instagram-slider-widget/tags/2.3.8/includes/class-feeds.php#L105
- https://plugins.trac.wordpress.org/browser/instagram-slider-widget/tags/2.3.8/libs/factory/pages/includes/admin-page.class.php#L342
- https://plugins.trac.wordpress.org/browser/instagram-slider-widget/tags/2.3.9