CVE-2025-11820 – The Graphina WordPress plugin has a stored XSS ... (How to Fix)

Q: What is the severity of CVE-2025-11820?

CVE-2025-11820 has a CVSS score of 6.4 (MEDIUM). The Graphina WordPress plugin has a stored XSS vulnerability that allows authenticated attackers with Contributor access or higher to inject malicious scripts into chart widgets. These scripts execute when users view pages containing the compromised charts, potentially compromising visitor accounts. All WordPress sites using Graphina plugin versions up to 3.1.8 are affected.

📋 TL;DR

The Graphina WordPress plugin has a stored XSS vulnerability that allows authenticated attackers with Contributor access or higher to inject malicious scripts into chart widgets. These scripts execute when users view pages containing the compromised charts, potentially compromising visitor accounts. All WordPress sites using Graphina plugin versions up to 3.1.8 are affected.

💻 Affected Systems

Products:

Graphina – Elementor Charts and Graphs WordPress plugin

Versions: All versions up to and including 3.1.8

Operating Systems: Any OS running WordPress

Default Config Vulnerable: ⚠️ Yes

Notes: Requires Contributor-level WordPress user access or higher to exploit. Affects multiple chart widgets including Area, Line, Column, Donut, Heatmap, Radar, Polar, Pie, Radial, and Advance Data Table.

⚠️ 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 session cookies, redirect users to malicious sites, deface websites, or install backdoors for persistent access.

🟠

Likely Case

Attackers with contributor accounts inject malicious scripts to steal visitor session data or redirect users to phishing pages.

🟢

If Mitigated

With proper user access controls and content security policies, impact is limited to potential data leakage from visitors viewing compromised pages.

🌐 Internet-Facing: HIGH

🏢 Internal Only: MEDIUM

🎯 Exploit Status

Public PoC: ⚠️ Yes

Weaponized: LIKELY

Unauthenticated Exploit: ✅ No

Complexity: LOW

Exploitation requires authenticated access but is technically simple once attacker has Contributor privileges. Public proof-of-concept exists in GitHub gist.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: 3.1.9 or later

Vendor Advisory: https://wordpress.org/plugins/graphina-elementor-charts-and-graphs/#developers

Restart Required: No

Instructions:

1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find Graphina plugin and click 'Update Now'. 4. Verify version is 3.1.9 or higher.

🔧 Temporary Workarounds

Restrict Contributor Privileges

all

Temporarily remove Contributor role access or restrict chart widget permissions

Implement Content Security Policy

linux

Add CSP headers to restrict script execution from untrusted sources

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 Graphina plugin entirely and use alternative charting solutions
Implement strict user access controls and audit all Contributor-level accounts

🔍 How to Verify

Check if Vulnerable:

Check WordPress admin → Plugins → Graphina version. If version is 3.1.8 or lower, you are vulnerable.

Check Version:

wp plugin list --name=graphina --field=version

Verify Fix Applied:

After updating, verify plugin version shows 3.1.9 or higher in WordPress admin panel.

📡 Detection & Monitoring

Log Indicators:

Unusual POST requests to chart widget endpoints
Multiple failed login attempts followed by successful Contributor login
Suspicious JavaScript in page content or database entries

Network Indicators:

Unexpected external script loads from chart pages
Data exfiltration to unknown domains

SIEM Query:

source="wordpress.log" AND ("graphina" OR "chart" OR "widget") AND ("POST" OR "update") AND status=200

📊 Metadata

CVE ID: CVE-2025-11820

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: 0.05% exploit probability (16.7th percentile)

Published: November 5, 2025

Last Updated: November 6, 2025

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