What is the CVSS score of EUVD-2026-15664?

EUVD-2026-15664 has a CVSS 3.1 base score of 7.1 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L. EPSS exploitation probability: 0.0%.

Which versions of Loobek are affected by EUVD-2026-15664?

The Loobek theme contains a reflected XSS vulnerability (CVE-2026-25349) that allows attackers to execute arbitrary JavaScript in users' browsers through malicious URLs, creating risk of session…. A patch is available.

How to fix or mitigate EUVD-2026-15664?

Within 24 hours: Identify all Loobek theme installations and document current versions across web properties. Within 7 days: Update Loobek theme to version 1.5.2 or later on all affected systems; verify updates are deployed. Within 30 days: Conduct security awareness training on phishing and malicious link recognition; implement Content Security Policy (CSP) headers to restrict script execution.

Loobek EUVD-2026-15664

| CVE-2026-25349 HIGH

Cross-site Scripting (XSS) (CWE-79)

2026-03-25 Patchstack

GHSA-mj42-5g77-9x8h

XSS Loobek

7.1

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.1 HIGH

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

Low

Lifecycle Timeline

Re-analysis Queued

Apr 24, 2026 - 16:37 vuln.today

cvss_changed

Analysis Updated

Apr 16, 2026 - 06:15 EUVD-patch-fix

executive_summary

Re-analysis Queued

Apr 16, 2026 - 05:29 backfill_euvd_patch

patch_released

Patch available

Apr 16, 2026 - 05:29 EUVD

1.5.2

EUVD ID Assigned

Mar 25, 2026 - 16:47 euvd

EUVD-2026-15664

Analysis Generated

Mar 25, 2026 - 16:47 vuln.today

CVE Published

Mar 25, 2026 - 16:14 nvd

HIGH 7.1

DescriptionCVE.org

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in skygroup Loobek loobek allows Reflected XSS.This issue affects Loobek: from n/a through < 1.5.2.

AnalysisAI

A Reflected Cross-Site Scripting (XSS) vulnerability exists in the skygroup Loobek theme (CWE-79: Improper Neutralization of Input During Web Page Generation) that allows attackers to inject malicious scripts into web pages viewed by users. The vulnerability affects Loobek versions prior to 1.5.2, as documented by Patchstack and tracked under ENISA EUVD ID EUVD-2026-15664. An attacker can craft a malicious URL containing unescaped input that, when clicked by a victim, executes arbitrary JavaScript in the victim's browser context, potentially leading to session hijacking, credential theft, or malware distribution.

Technical ContextAI

The vulnerability resides in the Loobek theme (cpe:2.3:a:skygroup:loobek:*:*:*:*:*:*:*:*), a WordPress theme component developed by skygroup. The root cause is CWE-79, which describes the failure to neutralize user-supplied input before it is output into dynamically generated web pages. In the context of a WordPress theme, this typically occurs when theme functions or template files directly output GET/POST parameters, URL query strings, or referrer headers without proper sanitization, escaping, or validation. The reflected nature of this XSS means the malicious payload is not stored in a database but travels through the URL or request itself, making it dependent on social engineering or link-injection attacks for successful exploitation. The theme's handling of user input in page generation routines—likely in theme hooks, template rendering, or custom shortcode handlers—fails to apply WordPress security functions such as esc_url(), esc_attr(), esc_html(), or wp_kses_post().

RemediationAI

Upgrade the Loobek theme to version 1.5.2 or later immediately. Visit the Patchstack vulnerability database (https://patchstack.com/database/Wordpress/Theme/loobek/vulnerability/wordpress-loobek-theme-1-5-2-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve) for detailed patch information and update instructions. For environments where immediate patching is not feasible, implement a Web Application Firewall (WAF) rule to block requests containing common XSS payloads in query strings and URL parameters, enforce Content Security Policy (CSP) headers to restrict script execution sources, and educate site administrators and users to avoid clicking on untrusted external links pointing to their own domain. Additionally, ensure all WordPress core files and other plugins are kept up to date, and consider using a security plugin to monitor for suspicious activity and provide additional input validation.