What the vulnerability does
01Description
The GNTT Post Title Ticker plugin for WordPress is vulnerable to Stored Cross-Site Scripting in version 1.0 via the `title-ticker-slide`, `title-ticker-fade`, and `title-ticker-typing` shortcodes. This is due to insufficient input sanitization and output escaping on shortcode attributes (notably `border`, `width`, `height`, `header_background`, `header_text_color`, and `id`) within the `gntt_title_ticker_slide()`, `gntt_title_ticker_fade()`, and `gntt_title_ticker_typing()` functions. None of these attribute values are passed through `esc_attr()` or any other escaping function before being concatenated into HTML output. 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.
Explanation of Vulnerability in Simple Terms
02Summary
GNTT Post Title Ticker versions 1.0 and earlier contain a cross-site scripting (XSS) vulnerability. An attacker with low-level user privileges can inject malicious scripts that execute in other users' browsers, potentially stealing session tokens or modifying site content. The vulnerability affects the entire site scope due to how the application processes user input.
What an attacker can do
03Attacker Capabilities
Inject JavaScript code that runs in other users' browsers and steals their session data or modifies site content.
Potential impact on your site
04Site Impact
Any logged-in user with low privileges can compromise other users' sessions or deface site content without additional clicks.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege user account on the site; no user interaction required from victims.
Key dates
06Disclosure timeline
May 27, 2026
CVE published
May 27, 2026
Record updated
