The Ultimate Video Player For WordPress <= 4.2.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'link_url' Shortcode Attribute

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Summary

CVECVE-2026-9125
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-12 02:16:42 UTC
Updated2026-06-12 13:13:53 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v3.1 6.4 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

EPSS: 0.002460000 probability, percentile 0.156080000 (date 2026-06-18)

Problem Types: CWE-79 | CWE-79 CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary6.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
3.1CNADECLARED6.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA 2winfactor Presto Player affected 4.2.0 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/browser/presto-player/tags/4.1.4/inc/Services/Shortcodes.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/presto-player/tags/4.1.4/dist/components/collection/c... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/presto-player/tags/4.1.1/dist/components/collection/c... [email protected] plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/c87e7f50-f14a-4751-abcb-3a5bd... [email protected] www.wordfence.com
plugins.trac.wordpress.org/browser/presto-player/tags/4.1.1/inc/Services/Shortcodes.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/changeset/3553268/presto-player/trunk/inc/Services/Shortcodes... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/presto-player/tags/4.1.1/inc/Services/Shortcodes.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/presto-player/tags/4.1.4/inc/Services/Shortcodes.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/presto-player/tags/4.1.1/templates/video.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/presto-player/tags/4.1.4/templates/video.php [email protected] plugins.trac.wordpress.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Dmitrii Ignatyev (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-05-20T17:56:26.000ZVendor Notified
CNA2026-06-11T12:49:42.000ZDisclosed
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