Detection Guidance

This vulnerability affects the WordPress Nyla Theme version 1.7 and below, allowing an attacker to inject malicious content into website pages or posts without authentication.

To detect if your system is vulnerable, first verify the version of the Nyla theme installed on your WordPress site.

• Check the theme version via WordPress admin dashboard under Appearance > Themes.
• Alternatively, use WP-CLI to check the theme version: `wp theme list --status=active` and look for 'nyla' and its version.

To detect exploitation attempts or presence of injected content, you can search for suspicious shortcode injections or unexpected HTML/script tags in your website content or database.

• Use a command to search for suspicious shortcodes or script tags in the WordPress database, for example using MySQL CLI: `SELECT ID, post_title FROM wp_posts WHERE post_content LIKE '%[shortcode]%' OR post_content LIKE '%<script>%';` (replace [shortcode] with relevant shortcode names if known).
• Scan web server logs for unusual requests that might indicate attempts to exploit the vulnerability.

Since there is no official patch, monitoring and detection rely on identifying the vulnerable theme version and scanning for injected content or exploitation patterns.

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Executive Summary

CVE-2026-39642 is a vulnerability in the WordPress Nyla Theme (version 1.7 and below) that allows an attacker to inject malicious code into website pages or posts. This happens because the theme improperly neutralizes script-related HTML tags, leading to a basic Cross-Site Scripting (XSS) issue.

The vulnerability does not require any authentication to exploit and is classified as a Content Injection issue. It falls under the OWASP Top 10 category A3: Injection.

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Impact Analysis

This vulnerability can allow attackers to inject malicious content into your website, which could be used to create phishing pages or deliver other malicious payloads to your visitors.

Although the severity is considered low with a CVSS score of 5.3, attackers may exploit this vulnerability in large-scale campaigns targeting many websites.

Because the vulnerability does not require authentication, any attacker can exploit it remotely, increasing the risk of widespread abuse.

Immediate action is recommended, such as updating the theme or consulting with a hosting provider or web developer to mitigate the risk.

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Mitigation Strategies

Immediate action is recommended to mitigate this vulnerability since there is no official patch available.

• Update the Nyla theme to a newer version if available.
• Seek assistance from your hosting provider or a web developer to implement temporary mitigations or workarounds.

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Compliance Impact

This vulnerability allows an attacker to inject malicious content into website pages or posts, potentially enabling phishing attacks. Such unauthorized content injection can lead to exposure of user data or compromise of website integrity.

While the CVE description and resources do not explicitly mention compliance with standards like GDPR or HIPAA, the presence of a code injection vulnerability that could be exploited to manipulate website content may increase the risk of data breaches or unauthorized data processing, which are critical concerns under these regulations.

Therefore, organizations using the vulnerable Nyla theme should consider this vulnerability as a potential compliance risk, especially if personal or sensitive data is involved, and take immediate remediation steps to mitigate it.

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