CVE-2026-84909
Custom Twitter Feeds <= 2.8.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'buttoncolor' Shortcode Attribute
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.
INFO
Published Date :
Sept. 18, 2026, 7:16 a.m.
Last Modified :
Sept. 18, 2026, 7:16 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-84909
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update the Custom Twitter Feeds plugin to version 2.8.1 or later.
- Sanitize and escape all user-supplied input.
- Avoid using unfiltered legacy shortcode attributes.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-84909.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-84909 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-84909
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-84909 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-84909 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by [email protected]
Sep. 18, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N Added CWE CWE-79 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/84xxx/CVE-2026-84909.json">CVE-2026-84909</a> Added Reference https://plugins.trac.wordpress.org/browser/custom-twitter-feeds/tags/2.8.0/custom-twitter-feed.php#L432 Added Reference https://plugins.trac.wordpress.org/browser/custom-twitter-feeds/tags/2.8.0/inc/CTF_Parse.php#L551 Added Reference https://plugins.trac.wordpress.org/browser/custom-twitter-feeds/tags/2.8.0/inc/CTF_Settings.php#L234 Added Reference https://plugins.trac.wordpress.org/browser/custom-twitter-feeds/tags/2.8.0/inc/CTF_Settings.php#L293 Added Reference https://plugins.trac.wordpress.org/browser/custom-twitter-feeds/tags/2.8.0/inc/CtfFeed.php#L139 Added Reference https://plugins.trac.wordpress.org/browser/custom-twitter-feeds/tags/2.8.0/inc/CtfFeed.php#L2001 Added Reference https://plugins.trac.wordpress.org/browser/custom-twitter-feeds/tags/2.8.0/inc/CtfFeed.php#L2338 Added Reference https://plugins.trac.wordpress.org/changeset?reponame=&new=3695675%40custom-twitter-feeds&old=3665650%40custom-twitter-feeds Added Reference https://www.wordfence.com/threat-intel/vulnerabilities/id/b1a9d042-c0c0-477a-8cdf-9fb9d2239059?source=cve