CVE-2025-47656: Spiraclethemes Site Library XSS Vulnerability

CVE-2025-47656 Overview

CVE-2025-47656 is a stored Cross-Site Scripting (XSS) vulnerability affecting the Spiraclethemes Site Library WordPress plugin. The flaw stems from improper neutralization of input during web page generation, classified under [CWE-79]. Authenticated attackers with low-level privileges can inject persistent JavaScript payloads that execute in the browsers of site visitors and administrators. The vulnerability affects all versions of the plugin up to and including 1.5.4. Exploitation requires user interaction and can result in session hijacking, credential theft, and unauthorized administrative actions within the WordPress environment.

Critical Impact
Authenticated attackers can store malicious scripts that execute in victim browsers, enabling session theft, defacement, and privilege escalation through the WordPress admin interface.

Affected Products

Spiracle Themes Spiraclethemes Site Library plugin for WordPress
All versions from initial release through 1.5.4
WordPress sites with the plugin activated

Discovery Timeline

2025-05-07 - CVE CVE-2025-47656 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-47656

Vulnerability Analysis

The vulnerability is a stored XSS flaw in the Spiraclethemes Site Library plugin. User-supplied input is written to persistent storage and later rendered in web pages without proper output encoding or input sanitization. When an administrator or visitor loads the affected page, the injected script executes in the context of the WordPress site origin.

Stored XSS is more damaging than reflected variants because the payload persists across sessions and affects every user who views the compromised content. Attackers commonly leverage this class of flaw to steal authentication cookies, perform actions on behalf of the victim, or pivot to full site takeover by targeting administrator accounts.

Exploitation requires the attacker to hold a low-privileged authenticated account on the target WordPress instance. Successful exploitation also requires a subsequent victim to interact with the affected page. The scope change indicates the injected script can affect resources beyond the vulnerable plugin's security boundary.

Root Cause

The root cause is the plugin's failure to properly neutralize special characters in user-controlled input before including that input in HTML output. The plugin does not apply WordPress sanitization functions such as esc_html(), esc_attr(), or wp_kses() on the affected fields. This allows raw HTML and JavaScript to be rendered as executable markup.

Attack Vector

An authenticated attacker with contributor-level or similar privileges submits a payload containing HTML script tags or event handlers through a plugin input field. The malicious content is stored in the WordPress database. When any subsequent user loads the page rendering that content, the browser parses and executes the injected script within the site's origin.

The vulnerability manifests in plugin fields that accept user input and render it back in the DOM without encoding. Refer to the Patchstack XSS Vulnerability Advisory for technical details on the specific injection points.

Detection Methods for CVE-2025-47656

Indicators of Compromise

Unexpected <script> tags, onerror, onload, or javascript: URIs stored in WordPress wp_posts, wp_postmeta, or plugin-specific database tables.
Outbound requests from administrator browsers to unfamiliar domains immediately after loading pages that render plugin content.
New administrator accounts, modified user roles, or unauthorized plugin installations following administrator visits to affected pages.

Detection Strategies

Query the WordPress database for HTML event handlers and script tags in fields managed by the Spiraclethemes Site Library plugin.
Deploy a web application firewall (WAF) rule set that flags requests containing common XSS payload patterns targeting plugin endpoints.
Review WordPress audit logs for content creation or modification events performed by low-privileged accounts.

Monitoring Recommendations

Monitor administrator session activity for anomalous cookie access, unexpected API calls, or actions occurring outside normal working hours.
Enable Content Security Policy (CSP) reporting to capture blocked inline script executions originating from plugin-rendered pages.
Track plugin version inventory across all WordPress instances to identify hosts running vulnerable releases.

How to Mitigate CVE-2025-47656

Immediate Actions Required

Identify all WordPress installations running Spiraclethemes Site Library version 1.5.4 or earlier and prioritize them for patching.
Audit existing plugin-managed content for stored payloads and remove or sanitize any injected scripts before restoring service.
Rotate administrator credentials and invalidate active sessions on any site suspected of exposure to injected content.

Patch Information

At the time of publication, no fixed version is referenced in the NVD entry. Consult the Patchstack XSS Vulnerability Advisory for the latest remediation guidance and any vendor-issued update beyond 1.5.4.

Workarounds

Deactivate and remove the Spiraclethemes Site Library plugin until a patched release is verified.
Restrict account creation and reduce the number of low-privileged users who can submit content through plugin interfaces.
Deploy a WAF ruleset that inspects and blocks XSS payload patterns in POST parameters targeting the plugin's endpoints.
Implement a strict Content Security Policy that disallows inline scripts and untrusted script sources.

bash

# Example: locate and disable the affected plugin via WP-CLI
wp plugin list --name=spiraclethemes-site-library --fields=name,status,version
wp plugin deactivate spiraclethemes-site-library