---
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: 0.29338
ingestedAt: '2026-08-29T00:27:53.443Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.