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CVE-2026-84909

MEDIUM 6.4 CVSS 3.1
Published
September 18, 2026
Last modified
September 18, 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 Custom Twitter Feeds – A Tweets Widget or X Feed Widget plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'buttoncolor' Shortcode Attribute in all versions up to, and including, 2.8.0 due to insufficient input sanitization and output escaping. 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. This vulnerability is exploitable on common installs where the admin has configured access tokens with zero or multiple legacy feeds, as this causes the ctf_statuses support_legacy_shortcode option to be set to boolean true by default, activating the unfiltered legacy shortcode attribute code path.

Affected WordPress components

  • Custom Twitter Feeds – A Tweets Widget or X Feed Widget Plugin · custom-twitter-feeds
    Confirmed match Active
    Up to and including 2.8.0
    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

  • smub Custom Twitter Feeds – A Tweets Widget or X Feed Widget — Up to and including 2.8.0

References

  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/custom-twitter-feeds/tags/2.8.0/custom-twitter-feed.php#L432
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/custom-twitter-feeds/tags/2.8.0/inc/CTF_Parse.php#L551
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/custom-twitter-feeds/tags/2.8.0/inc/CTF_Settings.php#L234
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/custom-twitter-feeds/tags/2.8.0/inc/CTF_Settings.php#L293
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/custom-twitter-feeds/tags/2.8.0/inc/CtfFeed.php#L139
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/custom-twitter-feeds/tags/2.8.0/inc/CtfFeed.php#L2001
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/custom-twitter-feeds/tags/2.8.0/inc/CtfFeed.php#L2338
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset?reponame=&new=3695675%40custom-twitter-feeds&old=3665650%40custom-twitter-feeds
  • www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/b1a9d042-c0c0-477a-8cdf-9fb9d2239059?source=cve
  • nvd.nist.gov Official NVD record