CVE-2025-23500

High

Published: 22 January 2025

Published

22 January 2025

Modified

23 April 2026

KEV Added

—

Patch

—

CVSS Score v3.1 7.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

EPSS Score 0.0011 29.3th percentile

Risk Priority 14 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-23500 is a high-severity Cross-site Scripting (CWE-79) vulnerability. Its CVSS base score is 7.1 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 29.3th 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-2025-23500 is an Improper Neutralization of Input During Web Page Generation vulnerability, classified as Reflected Cross-site Scripting (XSS) under CWE-79, in the WordPress plugin "Simple Custom post type custom field," also referred to as simple-content-construction-kit by faaiq. This issue affects all versions of the plugin from n/a through 1.0.3. Published on 2025-01-22, it carries a CVSS v3.1 base score of 7.1 (AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L), indicating high severity due to network accessibility, low attack complexity, and scope change.

Unauthenticated attackers can exploit this vulnerability remotely by crafting malicious inputs that are reflected in web page generation without proper neutralization. Exploitation requires user interaction, such as a victim clicking a malicious link or submitting tainted input, allowing arbitrary JavaScript execution in the context of the affected site. This can result in low-level impacts to confidentiality (e.g., session token theft), integrity (e.g., data manipulation), and availability, with the changed scope potentially affecting other users or site functionality.

The Patchstack advisory provides details on this WordPress plugin vulnerability, including assessment and recommendations for mitigation, accessible at https://patchstack.com/database/Wordpress/Plugin/simple-content-construction-kit/vulnerability/wordpress-simple-custom-post-type-custom-field-plugin-1-0-3-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve.

EU & UK References

🇪🇺 ENISA EUVD: EUVD-2025-3213

Vulnerability details

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in faaiq Simple Custom post type custom field simple-content-construction-kit allows Reflected XSS.This issue affects Simple Custom post type custom field: from n/a through <= 1.0.3.

CWE(s): CWE-79

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.

attack.mitre.org →

T1059.007 JavaScript Execution

Adversaries may abuse various implementations of JavaScript for execution.

attack.mitre.org →

Why these techniques?

Reflected XSS in public-facing WordPress plugin directly enables exploitation of public-facing applications (T1190) via crafted inputs and arbitrary JavaScript execution in browser context (T1059.007).

Confidence: HIGH · MITRE ATT&CK Enterprise v18.1