CVE-2026-84909 Cross-site scripting in Custom Twitter Feeds – A Tweets Widget or X Feed Widget
Authenticated contributors can inject arbitrary scripts via the buttoncolor shortcode attribute in the Custom Twitter Feeds plugin.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-84909?
CVE-2026-84909 is a medium-severity cross-site scripting vulnerability in smub Custom Twitter Feeds – A Tweets Widget or X Feed Widget, published on 18 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
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.
Weakness: CWE-79
Which versions are affected by CVE-2026-84909?
How do I fix CVE-2026-84909?
No fix has been published for CVE-2026-84909 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-84909 being exploited?
There is no known exploitation of CVE-2026-84909 in the wild and no public exploit code.
Sources
Also known as GHSA-9fp7-mwxw-94ff.