The Ultra Skype Button plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'btn_id' parameter of the [ultra_skype] shortcode in all versions up to, and including, 1.0 due to insufficient input sanitization and output escaping. 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.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Changed

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00042.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
sozan45 Ultra Skype Button unaffected
Version Status Constraints
* affected ≤ 1.0

No data.

No data.

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Vendors Products
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Project Subscriptions

Vendors Products
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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://plugins.trac.wordpress.org/browser/ultra-skype-button/tags/1.0/index.php#L39 cve-icon cve-icon
https://plugins.trac.wordpress.org/browser/ultra-skype-button/tags/1.0/index.php#L44 cve-icon cve-icon
https://plugins.trac.wordpress.org/browser/ultra-skype-button/trunk/index.php#L39 cve-icon cve-icon
https://plugins.trac.wordpress.org/browser/ultra-skype-button/trunk/index.php#L44 cve-icon cve-icon
https://www.wordfence.com/threat-intel/vulnerabilities/id/20b3c88f-a0df-4814-83b6-27440c5ad38e?source=cve cve-icon cve-icon
History

Tue, 09 Dec 2025 10:15:00 +0000

Type Values Removed Values Added
First Time appeared Sozan45
Sozan45 ultra Skype Button
Wordpress
Wordpress wordpress
Vendors & Products Sozan45
Sozan45 ultra Skype Button
Wordpress
Wordpress wordpress

Mon, 08 Dec 2025 21:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Sat, 06 Dec 2025 06:00:00 +0000

Type Values Removed Values Added
Description The Ultra Skype Button plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'btn_id' parameter of the [ultra_skype] shortcode in all versions up to, and including, 1.0 due to insufficient input sanitization and output escaping. 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.
Title Ultra Skype Button <= 1.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'btn_id' Shortcode Attribute
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 6.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Wordfence

Published:

Updated: 2025-12-08T20:56:08.509Z

Reserved: 2025-12-02T16:12:54.072Z

Link: CVE-2025-13898

cve-icon Vulnrichment

Updated: 2025-12-08T20:56:01.055Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-12-06T06:15:53.347

Modified: 2025-12-08T18:26:49.133

Link: CVE-2025-13898

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2025-12-08T09:39:24Z

Weaknesses