CVE-2026-4089 Twittee Text Tweet <= 1.0.8 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'id' Shortcode Attribute
Authenticated attackers can inject arbitrary scripts via shortcode attributes in the Twittee Text Tweet plugin, leading to stored XSS.
- 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-2026-4089?
CVE-2026-4089 is a medium-severity cross-site scripting vulnerability in johnnie2u Twittee Text Tweet, published on 22 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Twittee Text Tweet plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'id' shortcode attribute in all versions up to and including 1.0.8. This is due to insufficient input sanitization and output escaping on user-supplied shortcode attributes. The ttt_twittee_tweeter() function uses extract() to pull shortcode attributes into local variables and then directly concatenates them into HTML output without any escaping. Specifically, the $id parameter is inserted into an HTML id attribute context without esc_attr(), allowing an attacker to break out of the attribute and inject arbitrary HTML event handlers. Additionally, the $tweet, $content, $balloon, and $theme attributes are similarly injected into inline JavaScript without escaping (lines 87, 93, 101, 117). 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.
Weakness: CWE-79
Which versions are affected by CVE-2026-4089?
How do I fix CVE-2026-4089?
No fix has been published for CVE-2026-4089 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-2026-4089 being exploited?
There is no known exploitation of CVE-2026-4089 in the wild and no public exploit code.
Sources
Also known as GHSA-wfc4-vr66-fq9p.