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CVE-2026-121519

MEDIUM 6.4 CVSS 3.1
Published
November 7, 2026
Last modified
November 7, 2026
NVD status
Deferred
Reported by
security@wordfence.com
Weakness
CWE-79
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Description

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.

Affected WordPress components

  • Social Slider Feed – Social Media Feed & Gallery Widgets Plugin · instagram-slider-widget
    Confirmed match Active
    Up to and including 2.3.8
    View on WordPress.org

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • themeisle Social Slider Feed – Social Media Feed & Gallery Widgets — Up to and including 2.3.8

References

  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/instagram-slider-widget/tags/2.3.8/admin/pages/feeds.php#L219
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/instagram-slider-widget/tags/2.3.8/components/instagram/html_templates/templates/slider-overlay.php#L72
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/instagram-slider-widget/tags/2.3.8/components/instagram/html_templates/templates/slider.php#L67
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/instagram-slider-widget/tags/2.3.8/includes/class-feeds.php#L105
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/instagram-slider-widget/tags/2.3.8/libs/factory/pages/includes/admin-page.class.php#L342
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/instagram-slider-widget/tags/2.3.9
  • www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/3ae890e7-a5b6-41c5-bc30-792c0b9272a6?source=cve
  • nvd.nist.gov Official NVD record