CVE-2025-15440
Published: 11 February 2026
Summary
CVE-2025-15440 is a high-severity Cross-site Scripting (CWE-79) vulnerability in Wordpress (inferred from references). Its CVSS base score is 7.2 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 29.9th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-15 (Information Output Filtering).
Deeper analysis
CVE-2025-15440 is a stored cross-site scripting (XSS) vulnerability, classified under CWE-79, affecting the iONE360 configurator plugin for WordPress in all versions up to and including 2.0.57. The issue stems from insufficient input sanitization and output escaping in the Contact Form Parameters, enabling the injection of arbitrary web scripts into pages. Published on 2026-02-11, it carries a CVSS v3.1 base score of 7.2 (AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N).
Unauthenticated attackers can exploit this vulnerability over the network with low attack complexity and no privileges or user interaction required. By submitting malicious payloads via the Contact Form Parameters, they can store scripts on the server that execute in users' browsers whenever an affected page is accessed, potentially compromising session data or performing actions on behalf of the victim within the site's scope.
The provided references link to lines 50, 53, 56, 59, and 60 in the file admin/partials/configurator-ione360-admin-contact-form.php from plugin version 2.0.57, highlighting the specific code locations where input handling and output rendering lack proper sanitization and escaping. No explicit patch or mitigation details are detailed in the available information.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-206939
Vulnerability details
The iONE360 configurator plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Contact Form Parameters in all versions up to, and including, 2.0.57 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers…
more
to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Stored XSS in public-facing WordPress plugin directly enables exploitation of the web application (T1190) and arbitrary JavaScript execution in victim browsers (T1059.007), which facilitates session hijacking (T1185).
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly requires validation and sanitization of untrusted input such as Contact Form Parameters before storage, blocking the arbitrary script injection that enables this stored XSS.
Mandates output filtering/escaping of stored data before rendering in pages, directly mitigating the insufficient escaping flaw that allows injected scripts to execute.
Requires mechanisms to detect and block malicious code (including script payloads) in user-supplied content, providing secondary protection against the unauthenticated injection vector.