CVE-2025-9353 – The Themify Builder WordPress plugin has a stor... (How to Fix)

Q: What is the severity of CVE-2025-9353?

CVE-2025-9353 has a CVSS score of 6.4 (MEDIUM). The Themify Builder WordPress plugin has a stored cross-site scripting vulnerability that allows authenticated attackers with Contributor-level access or higher to inject malicious scripts into website pages. These scripts execute automatically when users visit the compromised pages, potentially stealing credentials or performing unauthorized actions. All versions up to and including 7.6.9 are affected.

📋 TL;DR

The Themify Builder WordPress plugin has a stored cross-site scripting vulnerability that allows authenticated attackers with Contributor-level access or higher to inject malicious scripts into website pages. These scripts execute automatically when users visit the compromised pages, potentially stealing credentials or performing unauthorized actions. All versions up to and including 7.6.9 are affected.

💻 Affected Systems

Products:

Themify Builder WordPress Plugin

Versions: All versions up to and including 7.6.9

Operating Systems: Any OS running WordPress

Default Config Vulnerable: ⚠️ Yes

Notes: The vulnerability requires authenticated access (Contributor role or higher) and affects the plugin's template files where input sanitization is insufficient.

⚠️ Manual Verification Required

This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.

Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).

🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.

Recommended Actions:

Review the CVE details at NVD
Check vendor security advisories for your specific version
Test if the vulnerability is exploitable in your environment
Consider updating to the latest version as a precaution

⚠️ Risk & Real-World Impact

🔴

Worst Case

Attackers could steal administrator credentials, deface websites, redirect users to malicious sites, or perform actions on behalf of authenticated users, potentially leading to complete site compromise.

🟠

Likely Case

Attackers with contributor access inject malicious scripts to steal user session cookies or credentials, potentially escalating privileges or performing unauthorized content modifications.

🟢

If Mitigated

With proper input validation and output escaping, the vulnerability would be prevented, and even if exploited, web application firewalls and content security policies could block malicious script execution.

🌐 Internet-Facing: HIGH

🏢 Internal Only: MEDIUM

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ✅ No

Complexity: MEDIUM

Exploitation requires authenticated access and knowledge of vulnerable parameters in template files. The partial patch in 7.6.9 may leave some attack vectors open.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Version after 7.6.9

Vendor Advisory: https://plugins.trac.wordpress.org/changeset/3355757/

Restart Required: No

Instructions:

1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find Themify Builder and click 'Update Now'. 4. Verify update to version after 7.6.9. 5. Clear any caching plugins or CDN caches.

🔧 Temporary Workarounds

Restrict User Roles

all

Limit Contributor and higher role assignments to trusted users only.

Implement Content Security Policy

all

Add CSP headers to restrict script execution sources.

Add to .htaccess: Header set Content-Security-Policy "default-src 'self'; script-src 'self'"
Or use WordPress security plugins to configure CSP

🧯 If You Can't Patch

Disable the Themify Builder plugin temporarily until patching is possible
Implement a web application firewall (WAF) with XSS protection rules

🔍 How to Verify

Check if Vulnerable:

Check WordPress admin > Plugins > Installed Plugins for Themify Builder version. If version is 7.6.9 or earlier, the site is vulnerable.

Check Version:

wp plugin list --name=themify-builder --field=version

Verify Fix Applied:

After updating, verify the plugin version is higher than 7.6.9 in WordPress admin panel.

📡 Detection & Monitoring

Log Indicators:

Unusual POST requests to Themify Builder template files
Multiple content updates from Contributor-level users
Script tags containing suspicious JavaScript in page content

Network Indicators:

Unexpected script sources loading from WordPress pages
Suspicious outbound connections from user browsers after visiting specific pages

SIEM Query:

source="wordpress.log" AND ("themify-builder" OR "template-fancy-heading" OR "template-icon") AND (POST OR "script" OR "onerror" OR "onload")

📊 Metadata

CVE ID: CVE-2025-9353

CVSS v3 Score: 6.4 (MEDIUM)

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

CWE: CWE-79

EPSS Score: 0.07% exploit probability (20.3th percentile)

Published: September 24, 2025

Last Updated: September 24, 2025

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