CVE-2025-23740

High

Published: 03 March 2025

Published

03 March 2025

Modified

23 April 2026

KEV Added

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Patch

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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 0.0023 46.2th percentile

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

Summary

CVE-2025-23740 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 Browser Session Hijacking (T1185); ranked at the 46.2th 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-2025-23740 is an Improper Neutralization of Input During Web Page Generation vulnerability, classified as Reflected Cross-site Scripting (XSS) under CWE-79, in the Easy School Registration WordPress plugin developed by Zbynek Nedoma. The issue affects the easy-school-registration plugin from unknown initial versions through version 3.9.8 inclusive. Published on 2025-03-03, it carries a CVSS v3.1 base score of 7.1.

Attackers can exploit this vulnerability remotely over the network (AV:N) with low attack complexity (AC:L), requiring no privileges (PR:N) but user interaction (UI:R), such as clicking a malicious link. The changed scope (S:C) enables limited impacts on confidentiality, integrity, and availability (C:L/I:L/A:L), typically allowing execution of arbitrary scripts in the victim's browser context to steal session cookies, tokens, or perform other client-side actions on behalf of the user.

The Patchstack advisory at https://patchstack.com/database/Wordpress/Plugin/easy-school-registration/vulnerability/wordpress-easy-school-registration-plugin-3-9-8-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve provides details on this Reflected XSS vulnerability in the WordPress Easy School Registration plugin version 3.9.8, including recommended mitigations such as updating to a patched version if available.

EU & UK References

🇪🇺 ENISA EUVD: EUVD-2025-5673

Vulnerability details

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Zbynek Nedoma Easy School Registration easy-school-registration allows Reflected XSS.This issue affects Easy School Registration: from n/a through <= 3.9.8.

CWE(s): CWE-79

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1185 Browser Session Hijacking Collection

Adversaries may take advantage of security vulnerabilities and inherent functionality in browser software to change content, modify user-behaviors, and intercept information as part of various browser session hijacking techniques.

attack.mitre.org →

T1539 Steal Web Session Cookie Credential Access

An adversary may steal web application or service session cookies and use them to gain access to web applications or Internet services as an authenticated user without needing credentials.

attack.mitre.org →

Why these techniques?

Reflected XSS allows arbitrary JS execution in victim's browser to steal session cookies (T1539) and hijack browser sessions (T1185).

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0