CVE-2025-64365 Overview
CVE-2025-64365 is a DOM-based Cross-Site Scripting (XSS) vulnerability affecting the Colabrio Ohio Extra WordPress plugin. The flaw stems from improper neutralization of user-supplied input during web page generation, classified under [CWE-79]. Attackers with low privileges can inject malicious scripts that execute in the browser context of victim users who interact with crafted content. The vulnerability affects all versions of Ohio Extra up to and including 3.6.0.
Critical Impact
Successful exploitation allows attackers to execute arbitrary JavaScript in a victim's browser, enabling session hijacking, credential theft, and unauthorized actions across a scope change boundary.
Affected Products
- Colabrio Ohio Extra WordPress plugin versions through 3.6.0
- WordPress sites with the Ohio Extra plugin activated
- Any deployment relying on vulnerable Ohio Extra installations
Discovery Timeline
- 2025-10-31 - CVE-2025-64365 published to the National Vulnerability Database (NVD)
- 2026-06-17 - Last updated in the NVD database
Technical Details for CVE-2025-64365
Vulnerability Analysis
The vulnerability resides in client-side JavaScript logic within the Ohio Extra plugin. Untrusted input flows into a DOM sink without proper sanitization or encoding. When a user loads a page containing attacker-controlled input, the browser parses the injected payload as executable script.
DOM-based XSS differs from reflected or stored variants because the injection occurs entirely on the client. Server-side filtering does not observe the malicious content, making detection through traditional web application firewall inspection more difficult. The scope change component indicates the vulnerability can affect resources beyond the vulnerable component's security authority.
Exploitation requires user interaction, such as clicking a crafted link or loading a manipulated page. Authenticated attackers with low-privilege accounts can weaponize the flaw to target higher-privilege users, including administrators.
Root Cause
The root cause is missing or insufficient neutralization of input before it reaches a DOM manipulation function. Client-side code likely writes untrusted data into properties such as innerHTML, document.write, or similar sinks without contextual output encoding. The Ohio Extra plugin does not enforce a strict input validation policy on values consumed by its JavaScript components.
Attack Vector
The attack vector is network-based and requires low privileges plus user interaction. An attacker crafts a URL or content payload containing JavaScript. When a victim loads the resource in a browser that renders Ohio Extra components, the script executes with the origin's privileges. This enables theft of cookies, session tokens, and access to authenticated WordPress functionality.
Refer to the Patchstack WordPress Ohio Plugin Vulnerability advisory for additional technical context.
Detection Methods for CVE-2025-64365
Indicators of Compromise
- Unexpected <script> tags, javascript: URIs, or event handler attributes (onerror, onload) appearing in WordPress post content, comments, or Ohio Extra widget configurations
- Outbound browser requests to unknown domains originating from pages rendered by the Ohio Extra plugin
- Anomalous administrative actions performed from valid sessions without corresponding user activity
Detection Strategies
- Inventory WordPress installations for the Ohio Extra plugin and identify versions at or below 3.6.0
- Review web server access logs for query strings and URL fragments containing script tags, encoded payloads, or DOM manipulation primitives
- Deploy Content Security Policy (CSP) reporting to capture script execution violations on pages using Ohio Extra
Monitoring Recommendations
- Monitor authenticated WordPress sessions for privilege escalation patterns following exposure to crafted URLs
- Alert on modifications to plugin files, theme templates, or administrative user accounts on affected sites
- Track browser telemetry for unexpected redirects, credential form injections, or third-party script loads on Ohio Extra pages
How to Mitigate CVE-2025-64365
Immediate Actions Required
- Identify all WordPress sites running Ohio Extra 3.6.0 or earlier and prioritize remediation
- Restrict low-privilege account creation and audit existing contributor and author accounts for suspicious activity
- Apply Content Security Policy headers that block inline script execution and restrict script sources to trusted origins
Patch Information
Consult the Patchstack advisory for the latest vendor patch status. If Colabrio has released a version above 3.6.0, update immediately through the WordPress plugin management interface.
Workarounds
- Deactivate the Ohio Extra plugin until a fixed version is installed if operational requirements allow
- Deploy a web application firewall rule set that blocks common XSS payload patterns targeting WordPress plugins
- Enforce browser-side protections by adding strict CSP directives such as default-src 'self' and disabling unsafe-inline
# Example CSP header configuration for Apache
Header set Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'; base-uri 'self'"
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
