CVE-2026-9125
MediumCVSS 6.4Exploitation Probability (EPSS)
Low risk18th percentile — higher than 18% of all known CVEs
Summary
The Presto Player plugin for WordPress is vulnerable to Stored Cross-Site Scripting (XSS) via the 'link_url' parameter of the [presto_player_overlay] shortcode in versions up to and including 4.2.0. This is due to insufficient input sanitization and output escaping in the getOverlays() function.
Risk Assessment
Authenticated attackers with contributor-level access and above can inject arbitrary web scripts that will execute whenever a user accesses an injected page. This poses a serious threat to user security and site integrity.
Recommendation
It is recommended to update the Presto Player plugin to the latest version to mitigate this vulnerability. Additionally, implementing extra security measures such as Content Security Policy (CSP) is advisable.
Original NVD description (English source)
The Presto Player plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'link_url' parameter of the [presto_player_overlay] shortcode in versions up to, and including, 4.2.0 This is due to insufficient input sanitization and output escaping in the getOverlays() function, which copies the link_url shortcode attribute directly into the overlay configuration without scheme validation, allowing javascript: URIs to survive and be rendered as the href of a clickable anchor element by the presto-dynamic-overlay-ui web component. 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.