CVE-2026-9125 json
The Ultimate Video Player For WordPress <= 4.2.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'link_url' Shortcode Attribute
published 2026-06-12 4 mo ago modified 2026-08-28 2 mo ago also EUVD-2026-36372
- cvss
- 6.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 29%
- public exploits
- 0
- none known
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 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.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 4 mo ago
Exploit prediction
0.36% chance of exploitation in the next 30 days, higher than 29% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
Affected products
- 2winfactor Presto Player
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/c87e7f50-f14a-4751-abcb-3a5bdd214889?source=cve
- plugins.trac.wordpress.org /browser/presto-player/tags/4.1.4/inc/Services/Shortcodes.php#L464
- plugins.trac.wordpress.org /browser/presto-player/tags/4.1.4/inc/Services/Shortcodes.php#L513
- plugins.trac.wordpress.org /browser/presto-player/tags/4.1.4/templates/video.php#L16
- plugins.trac.wordpress.org /browser/presto-player/tags/4.1.4/dist/components/collection/components/core/features/presto-dynamic-overlays/
- plugins.trac.wordpress.org /browser/presto-player/tags/4.1.1/inc/Services/Shortcodes.php#L464
- plugins.trac.wordpress.org /browser/presto-player/tags/4.1.1/inc/Services/Shortcodes.php#L513
- plugins.trac.wordpress.org /browser/presto-player/tags/4.1.1/templates/video.php#L16
- plugins.trac.wordpress.org /browser/presto-player/tags/4.1.1/dist/components/collection/components/core/features/presto-dynamic-overlays/
- plugins.trac.wordpress.org /changeset/3553268/presto-player/trunk/inc/Services/Shortcodes.php
- research.cleantalk.org /cve-2026-9125/
Sources
- CVE List CVE-2026-9125
- NVD CVE-2026-9125
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.