CVE-2025-7040 – The Cloud SAML SSO WordPress plugin has a missi... (How to Fix)

Q: What is the severity of CVE-2025-7040?

CVE-2025-7040 has a CVSS score of 8.2 (HIGH). The Cloud SAML SSO WordPress plugin has a missing capability check that allows unauthenticated attackers to modify organization settings via POST requests. This can break SSO functionality and cause denial-of-service. All WordPress sites using this plugin up to version 1.0.19 are affected.

📋 TL;DR

The Cloud SAML SSO WordPress plugin has a missing capability check that allows unauthenticated attackers to modify organization settings via POST requests. This can break SSO functionality and cause denial-of-service. All WordPress sites using this plugin up to version 1.0.19 are affected.

💻 Affected Systems

Products:

Cloud SAML SSO WordPress Plugin

Versions: All versions up to and including 1.0.19

Operating Systems: Any OS running WordPress

Default Config Vulnerable: ⚠️ Yes

Notes: All installations with the plugin active are vulnerable regardless of configuration.

⚠️ 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 disable SSO signing/encryption, breaking authentication entirely and locking legitimate users out of the WordPress site.

🟠

Likely Case

Attackers modify SSO configuration to disrupt authentication flows, causing login failures and user access issues.

🟢

If Mitigated

With proper network controls, only authenticated administrators can modify settings, maintaining normal SSO operations.

🌐 Internet-Facing: HIGH

🏢 Internal Only: MEDIUM

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: LIKELY

Unauthenticated Exploit: ⚠️ Yes

Complexity: LOW

Simple HTTP POST request to vulnerable endpoint with no authentication required.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: 1.0.20 or later

Vendor Advisory: https://plugins.trac.wordpress.org/browser/cloud-sso-single-sign-on

Restart Required: No

Instructions:

1. Log into WordPress admin panel. 2. Navigate to Plugins. 3. Find Cloud SAML SSO plugin. 4. Click 'Update Now' if available. 5. If not, download version 1.0.20+ from WordPress.org and manually update.

🔧 Temporary Workarounds

Block Vulnerable Endpoint

linux

Use web application firewall or .htaccess to block access to the vulnerable action handler

# Add to .htaccess:
RewriteCond %{QUERY_STRING} action=csso_handle_actions [NC]
RewriteRule ^ - [F]

Disable Plugin

all

Temporarily disable the Cloud SAML SSO plugin until patched

wp plugin deactivate cloud-sso-single-sign-on

🧯 If You Can't Patch

Implement network-level restrictions to block external access to WordPress admin-ajax.php endpoint
Enable WordPress security plugins that add additional authentication layers for admin functions

🔍 How to Verify

Check if Vulnerable:

Check WordPress admin > Plugins > Cloud SAML SSO for version number. If version is 1.0.19 or lower, you are vulnerable.

Check Version:

wp plugin get cloud-sso-single-sign-on --field=version

Verify Fix Applied:

After update, verify plugin version shows 1.0.20 or higher in WordPress admin panel.

📡 Detection & Monitoring

Log Indicators:

POST requests to /wp-admin/admin-ajax.php with action=csso_handle_actions and set_organization_settings parameter from unauthenticated IPs
Unusual modifications to wp_options table with option_name containing 'csso_'

Network Indicators:

HTTP POST requests to admin-ajax.php endpoint with csso_handle_actions parameter from external IPs

SIEM Query:

source="wordpress.log" AND "admin-ajax.php" AND "action=csso_handle_actions" AND NOT user_agent="WordPress/*"

📊 Metadata

CVE ID: CVE-2025-7040

CVSS v3 Score: 8.2 (HIGH)

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

CWE: CWE-862

EPSS Score: 0.13% exploit probability (32.9th percentile)

Published: September 6, 2025

Last Updated: September 8, 2025

🔗 References

📤 Share & Export

📄 Export Markdown 📋 Export JSON

🔗 Related Vulnerabilities

If you're affected by CVE-2025-7040, you might also want to check these: