Cyber Resilience

CVE-2026-27376

High

Published: 05 March 2026

Published
05 March 2026
Modified
22 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 0.0004 14.4th percentile
Risk Priority 14 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-27376 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-2026-27376 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 JanStudio Claue - Clean, Minimal Elementor WooCommerce Theme for WordPress, impacting all versions from n/a through 2.2.7 inclusive. The issue was published on 2026-03-05 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).

Remote attackers can exploit this vulnerability without requiring privileges, over the network with low attack complexity, though it demands user interaction such as visiting a maliciously crafted link or page. Successful exploitation allows injection and execution of arbitrary scripts in the victim's browser context, resulting in low impacts to confidentiality, integrity, and availability, with a changed scope that extends effects beyond the vulnerable component.

The Patchstack advisory at https://patchstack.com/database/Wordpress/Theme/claue/vulnerability/wordpress-claue-clean-minimal-elementor-woocommerce-theme-theme-2-2-7-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve details the vulnerability in Claue theme version 2.2.7 and preceding releases, recommending mitigation through updating to a patched version of the theme beyond 2.2.7.

EU & UK References

Vulnerability details

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in JanStudio Claue - Clean, Minimal Elementor WooCommerce Theme claue allows Reflected XSS.This issue affects Claue - Clean, Minimal Elementor WooCommerce Theme: from n/a through <= 2.2.7.

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 →
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 in public-facing WordPress theme directly enables T1190 (exploiting the vulnerable web app via crafted input), T1059.007 (arbitrary JavaScript execution in browser), T1185 (browser session hijacking via script context), and T1539 (stealing web session cookies).

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

CVEs Like This One

CVE-2025-67949Shared CWE-79
CVE-2024-56033Shared CWE-79
CVE-2025-23549Shared CWE-79
CVE-2026-27072Shared CWE-79
CVE-2026-27068Shared CWE-79
CVE-2025-59542Shared CWE-79
CVE-2025-26989Shared CWE-79
CVE-2026-28103Shared CWE-79
CVE-2026-26266Shared CWE-79
CVE-2025-23838Shared 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 web page generation, blocking the reflected XSS payload in Claue theme requests.

SI-15 Information Output Filtering good match
prevent

Requires filtering of information output to browsers, preventing execution of attacker-supplied scripts that the vulnerable theme fails to neutralize.

SI-2 Flaw Remediation partial match
prevent

Mandates timely remediation of known flaws such as the improper neutralization in Claue <= 2.2.7 by applying the vendor patch.

References