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Vulnerability · Published Sep 18, 2026 · Assigned by Wordfence

CVE-2026-84909Custom Twitter Feeds <= 2.8.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'buttoncolor' Shortcode Attribute

Medium 6.4

In plain English

A medium-severity cross-site scripting in Custom Twitter Feeds – A Tweets Widget or X Feed Widget from smub. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities).

Severity (CVSS 3.1)6.4Medium
Exploit odds (30 days)0.4%top 64.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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 products (as reported)

VendorProductVersions
smub Custom Twitter Feeds – A Tweets Widget or X Feed Widget 0 – through 2.8.0

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

References