CVE-2025-26907

High

Published: 25 February 2025

Published

25 February 2025

Modified

23 April 2026

KEV Added

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Patch

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CVSS Score v3.1 7.5 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Score 0.0018 39.2th percentile

Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-26907 is a high-severity Cross-site Scripting (CWE-79) vulnerability. Its CVSS base score is 7.5 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 39.2th 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-2025-26907 is an Improper Neutralization of Input During Web Page Generation vulnerability, enabling Stored Cross-site Scripting (XSS), in the Estatik Mortgage Calculator WordPress plugin (estatik-mortgage-calculator). This issue affects all versions from n/a through 2.0.12 inclusive. Published on 2025-02-25T15:15:26.263, it carries a CVSS v3.1 base score of 7.5 (AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H) and maps to CWE-79.

Low-privileged authenticated users (PR:L) can exploit this vulnerability over the network (AV:N), though it requires high attack complexity (AC:H) and no user interaction (UI:N). Successful exploitation allows attackers to achieve high impacts on confidentiality, integrity, and availability (C:H/I:H/A:H) within the unchanged scope (S:U), such as injecting malicious scripts that persist and execute for other users viewing affected pages.

The Patchstack advisory provides further details on mitigation: https://patchstack.com/database/Wordpress/Plugin/estatik-mortgage-calculator/vulnerability/wordpress-estatik-mortgage-calculator-plugin-2-0-12-local-file-inclusion-vulnerability?_s_id=cve.

EU & UK References

🇪🇺 ENISA EUVD: EUVD-2025-5390

Vulnerability details

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Estatik Mortgage Calculator Estatik estatik-mortgage-calculator allows Stored XSS.This issue affects Mortgage Calculator Estatik: from n/a through <= 2.0.12.

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?

Stored XSS in public-facing WordPress plugin directly enables exploitation of the web application (T1190) and arbitrary JavaScript execution in victim browsers (T1059.007).

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