CVE-2025-2560

4.8 MEDIUM

📋 TL;DR

This vulnerability in the Ninja Forms WordPress plugin allows administrators to inject malicious scripts into plugin settings, which then execute when other users view those settings. It affects WordPress sites using Ninja Forms plugin versions before 3.10.1, particularly in multisite configurations where unfiltered_html capability is restricted.

💻 Affected Systems

Products:
  • Ninja Forms WordPress Plugin
Versions: All versions before 3.10.1
Operating Systems: Any OS running WordPress
Default Config Vulnerable: ⚠️ Yes
Notes: Requires WordPress multisite setup or environments where unfiltered_html capability is disallowed for the vulnerability to be exploitable.

📦 What is this software?

⚠️ Risk & Real-World Impact

🔴

Worst Case

Administrator account compromise leading to site takeover, credential theft from other users, or malware distribution to visitors.

🟠

Likely Case

Privileged admin user could inject malicious JavaScript that executes when other administrators or editors view plugin settings, potentially stealing session cookies or performing unauthorized actions.

🟢

If Mitigated

With proper user access controls and regular plugin updates, impact is limited to potential data exposure from compromised admin accounts.

🌐 Internet-Facing: MEDIUM - WordPress sites are typically internet-facing, but exploitation requires admin privileges which reduces attack surface.
🏢 Internal Only: LOW - Internal-only WordPress installations have reduced risk since attackers would need internal network access first.

🎯 Exploit Status

Public PoC: ✅ No
Weaponized: UNKNOWN
Unauthenticated Exploit: ✅ No
Complexity: LOW - Requires admin privileges but simple XSS payload injection.

Exploitation requires administrative access to WordPress, making it primarily an insider threat or post-compromise attack vector.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: 3.10.1

Vendor Advisory: https://wpscan.com/vulnerability/2adaa55a-4a0d-40ca-ae19-fcb82420894a/

Restart Required: No

Instructions:

1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find Ninja Forms plugin. 4. Click 'Update Now' if available. 5. Alternatively, download version 3.10.1+ from WordPress.org and manually update.

🔧 Temporary Workarounds

Temporary Access Restriction

all

Restrict plugin settings access to only essential administrators until patched.

Content Security Policy

linux

Implement strict CSP headers to mitigate XSS impact.

Add to .htaccess: Header set Content-Security-Policy "default-src 'self'; script-src 'self' 'unsafe-inline' https://trusted-cdn.com;"

🧯 If You Can't Patch

  • Remove Ninja Forms plugin and use alternative form solutions
  • Implement strict user access controls and monitor admin user activities

🔍 How to Verify

Check if Vulnerable:

Check WordPress admin → Plugins → Ninja Forms → Version number. If version is below 3.10.1, system is vulnerable.

Check Version:

wp plugin list --name=ninja-forms --field=version

Verify Fix Applied:

Confirm Ninja Forms plugin version is 3.10.1 or higher in WordPress admin panel.

📡 Detection & Monitoring

Log Indicators:

  • Unusual plugin setting modifications by admin users
  • JavaScript injection patterns in plugin option values

Network Indicators:

  • Unexpected external script loads from WordPress admin pages

SIEM Query:

source="wordpress.log" AND ("ninja_forms" OR "plugin_settings") AND ("update_option" OR "save_settings") AND ("script" OR "javascript" OR "onclick")

🔗 References

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