{"id":"CVE-2026-9125","title":"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 sanitizat…","summary":"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 sanitizat…","severity":"medium","cvss":6.4,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","cwe":["CWE-79"],"published":"2026-06-12","updated":"2026-08-28","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-9125","references":[{"url":"https://plugins.trac.wordpress.org/browser/presto-player/tags/4.1.1/dist/components/collection/components/core/features/presto-dynamic-overlays/component/presto-dynamic-overlays.js#L1","label":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/presto-player/tags/4.1.1/inc/Services/Shortcodes.php#L464","label":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/presto-player/tags/4.1.1/inc/Services/Shortcodes.php#L513","label":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/presto-player/tags/4.1.1/templates/video.php#L16","label":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/presto-player/tags/4.1.4/dist/components/collection/components/core/features/presto-dynamic-overlays/component/presto-dynamic-overlays.js#L1","label":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/presto-player/tags/4.1.4/inc/Services/Shortcodes.php#L464","label":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/presto-player/tags/4.1.4/inc/Services/Shortcodes.php#L513","label":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/presto-player/tags/4.1.4/templates/video.php#L16","label":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/changeset/3553268/presto-player/trunk/inc/Services/Shortcodes.php","label":"security@wordfence.com"},{"url":"https://research.cleantalk.org/cve-2026-9125/","label":"security@wordfence.com"},{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/c87e7f50-f14a-4751-abcb-3a5bdd214889?source=cve","label":"security@wordfence.com"}],"tags":["nvd"],"epss":0.00355,"epssPercentile":0.2922,"ingestedAt":"2026-08-29T00:27:53.443Z","slug":"CVE-2026-9125","body":"## Overview\n\nThe 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":35,"depthScoreParts":{"impact":35.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}