Cyber Resilience

CVE-2025-67991

High

Published: 20 February 2026

Published
20 February 2026
Modified
15 April 2026
KEV Added
—
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 0.0004 14.4th percentile
Risk Priority 14 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-67991 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 14.4th 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-2025-67991 is an Improper Neutralization of Input During Web Page Generation vulnerability, enabling Reflected Cross-site Scripting (XSS) as classified under CWE-79. It affects the User Extra Fields WordPress plugin (wp-user-extra-fields) by vanquish, impacting versions from n/a through 16.8 inclusive. The issue was published on 2026-02-20.

With 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), the vulnerability is exploitable over the network by unauthenticated attackers with low attack complexity, though it requires user interaction such as visiting a malicious link. Successful exploitation allows attackers to inject and execute arbitrary scripts in the context of the victim's browser, potentially compromising session data or performing actions on behalf of the user, resulting in low impacts to confidentiality, integrity, and availability with a changed scope.

The Patchstack advisory (https://patchstack.com/database/Wordpress/Plugin/wp-user-extra-fields/vulnerability/wordpress-user-extra-fields-plugin-16-8-cross-site-scripting-xss-vulnerability?_s_id=cve) documents the vulnerability and provides details relevant to mitigation for affected WordPress installations.

EU & UK References

Vulnerability details

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in vanquish User Extra Fields wp-user-extra-fields allows Reflected XSS.This issue affects User Extra Fields: from n/a through <= 16.8.

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 web application (T1190) and arbitrary JavaScript execution in victim browser (T1059.007).

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

CVEs Like This One

CVE-2026-3231Shared CWE-79
CVE-2025-23481Shared CWE-79
CVE-2025-69302Shared CWE-79
CVE-2025-23734Shared CWE-79
CVE-2025-23571Shared CWE-79
CVE-2025-65110Shared CWE-79
CVE-2026-24948Shared CWE-79
CVE-2025-27352Shared CWE-79
CVE-2025-30349Shared CWE-79
CVE-2026-3876Shared CWE-79

Affected Assets

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

SI-10 Information Input Validation good match
prevent

Directly requires validation and neutralization of untrusted input before it is used in web page generation, blocking the reflected XSS payload at its source.

SI-15 Information Output Filtering good match
prevent

Requires filtering of information output to remove or encode dangerous content, preventing arbitrary script execution in the victim's browser context.

SI-3 Malicious Code Protection partial match
preventdetect

Can enforce malicious-code protections (e.g., script filtering or sandboxing) that limit the ability of injected XSS payloads to execute or persist.

References