CVE-2025-22556: Norse Rune Oracle Plugin CSRF Vulnerability

CVE-2025-22556 Overview

CVE-2025-22556 is a Cross-Site Request Forgery (CSRF) vulnerability affecting the Norse Rune Oracle Plugin developed by WP CMS Ninja for WordPress. This vulnerability allows attackers to perform unauthorized actions on behalf of authenticated users by tricking them into visiting a malicious webpage. When exploited, this CSRF vulnerability can chain with Stored Cross-Site Scripting (XSS), significantly amplifying the potential impact.

Critical Impact

Attackers can leverage this CSRF vulnerability to perform unauthorized administrative actions and inject persistent malicious scripts, potentially leading to full site compromise and affecting all site visitors.

Affected Products

• Norse Rune Oracle Plugin versions up to and including 1.4.2
• WordPress sites running vulnerable versions of the plugin
• All users of affected WordPress installations

Discovery Timeline

• 2025-01-07 - CVE-2025-22556 published to NVD
• 2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-22556

Vulnerability Analysis

This vulnerability stems from insufficient CSRF protection in the Norse Rune Oracle Plugin for WordPress. The plugin fails to properly validate nonce tokens or implement other anti-CSRF mechanisms when processing sensitive administrative requests. This allows an attacker to craft malicious requests that, when triggered by an authenticated administrator, execute unintended actions within the plugin's context.

The vulnerability is particularly concerning because it chains with Stored XSS capabilities. An attacker can exploit the CSRF weakness to inject malicious JavaScript code into the plugin's settings or content areas, which then persists in the database and executes whenever other users view the affected pages.

Root Cause

The root cause of CVE-2025-22556 is the absence of proper Cross-Site Request Forgery protections in the plugin's form handling and AJAX endpoints. WordPress provides built-in nonce verification functions (wp_nonce_field(), wp_verify_nonce(), and check_admin_referer()) specifically designed to prevent CSRF attacks, but the vulnerable versions of this plugin do not properly implement these security controls.

Attack Vector

The attack requires network access and user interaction. An attacker must convince an authenticated WordPress administrator to visit a malicious webpage or click a crafted link while logged into their WordPress dashboard. The malicious page contains hidden forms or JavaScript that automatically submit requests to the vulnerable plugin endpoints, bypassing any expectation of user consent.

The attack typically unfolds in these stages:

1. Attacker identifies a target WordPress site using the vulnerable Norse Rune Oracle Plugin
2. Attacker crafts a malicious HTML page containing hidden form elements targeting the plugin's unprotected endpoints
3. Attacker tricks an authenticated administrator into visiting the malicious page
4. The victim's browser automatically submits the forged request with the admin's session cookies
5. The plugin processes the request as legitimate, executing the attacker's intended actions
6. If chained with XSS, malicious scripts are stored and execute for all subsequent visitors

Detection Methods for CVE-2025-22556

Indicators of Compromise

• Unexpected changes to plugin settings or content that administrators did not authorize
• Suspicious JavaScript code appearing in plugin-generated content or database entries
• Administrator activity logs showing configuration changes during times when no legitimate admin was active
• Reports from site visitors of unusual browser behavior or redirects when viewing pages with Norse Rune Oracle content

Detection Strategies

• Review WordPress access logs for suspicious POST requests to Norse Rune Oracle Plugin endpoints originating from external referrers
• Implement Web Application Firewall (WAF) rules to detect and block requests with suspicious referrer headers targeting plugin endpoints
• Deploy Content Security Policy (CSP) headers to mitigate the impact of any successful XSS injection
• Use WordPress security plugins that monitor for unauthorized setting changes and alert administrators

Monitoring Recommendations

• Enable detailed logging for WordPress admin actions and plugin configuration changes
• Set up alerts for any modifications to plugin settings outside of expected maintenance windows
• Monitor the WordPress database for unexpected script tags or suspicious content in plugin-related tables
• Regularly audit installed plugin versions against known vulnerability databases

How to Mitigate CVE-2025-22556

Immediate Actions Required

• Update the Norse Rune Oracle Plugin to a patched version if one is available from the vendor
• If no patch is available, consider temporarily deactivating the plugin until a fix is released
• Review all plugin settings and content for signs of tampering or injected scripts
• Instruct WordPress administrators to log out of the dashboard when not actively using it
• Implement additional CSRF protection at the web server or WAF level

Patch Information

Users should check the Patchstack Vulnerability Report for the latest information on available patches and remediation guidance. Contact WP CMS Ninja for official patch availability and update to the latest version as soon as a security fix is released.

Workarounds

• Deactivate the Norse Rune Oracle Plugin until a security patch is available
• Implement additional access controls limiting who can access WordPress admin areas
• Deploy a Web Application Firewall with CSRF protection rules enabled
• Use browser extensions or security policies that block cross-origin form submissions to your WordPress admin URLs

# Temporarily deactivate the vulnerable plugin via WP-CLI
wp plugin deactivate norse-runes-oracle

# Verify the plugin is deactivated
wp plugin status norse-runes-oracle

# When a patched version is available, update the plugin
wp plugin update norse-runes-oracle

# Re-enable after updating to patched version
wp plugin activate norse-runes-oracle