CVE-2025-70846: lty628 aidigu XSS Vulnerability

CVE-2025-70846 Overview

CVE-2025-70846 is a Cross-Site Scripting (XSS) vulnerability affecting lty628 aidigu version 1.9.1. The vulnerability exists in the /tools/Password/add page, specifically within the password input field. An attacker could exploit this flaw to inject malicious scripts that execute in the context of a victim's browser session, potentially leading to session hijacking, credential theft, or other malicious activities.

Critical Impact

This XSS vulnerability allows attackers to inject and execute arbitrary JavaScript code through the password input field, potentially compromising user sessions and sensitive data within the aidigu application.

Affected Products

• lty628 aidigu v1.9.1

Discovery Timeline

• 2026-02-17 - CVE-2025-70846 published to NVD
• 2026-02-18 - Last updated in NVD database

Technical Details for CVE-2025-70846

Vulnerability Analysis

This Cross-Site Scripting (XSS) vulnerability occurs due to insufficient input validation and output encoding in the password management functionality of the aidigu application. When a user submits data through the password input field on the /tools/Password/add page, the application fails to properly sanitize or encode special characters before rendering them in the browser.

The vulnerability allows an attacker to craft malicious input containing JavaScript code that gets stored or reflected back to users. When the malicious payload is rendered in a victim's browser, the injected script executes within the application's security context, giving attackers access to session tokens, cookies, and the ability to perform actions on behalf of authenticated users.

Root Cause

The root cause of this vulnerability is improper input validation and lack of output encoding in the aidigu application's password management module. The application accepts user-supplied input in the password field without adequately sanitizing potentially dangerous characters such as <, >, ", ', and &. When this unsanitized input is subsequently displayed or processed, the browser interprets embedded script tags or event handlers as executable code rather than treating them as plain text.

Attack Vector

The attack vector involves an adversary injecting malicious JavaScript payload through the password input field on the /tools/Password/add endpoint. The attack could manifest as either a stored XSS (where the malicious payload is persisted in the application's database and executed whenever users view the affected data) or a reflected XSS (where the payload is immediately reflected back in the server's response).

A typical attack scenario involves an attacker crafting a URL or form submission containing XSS payloads such as script tags or event handler attributes. When a victim user interacts with the compromised page, the injected JavaScript executes with full access to the user's session, enabling cookie theft, keylogging, or unauthorized actions within the application.

Detection Methods for CVE-2025-70846

Indicators of Compromise

• Unusual HTTP requests to /tools/Password/add containing script tags, event handlers (e.g., onerror, onload), or encoded JavaScript payloads
• Unexpected JavaScript execution or DOM modifications in browser developer tools when accessing password management pages
• Network logs showing requests with encoded characters like %3Cscript%3E or unusual special character sequences in password field parameters

Detection Strategies

• Implement web application firewall (WAF) rules to detect and block common XSS patterns in request parameters targeting the /tools/Password/add endpoint
• Deploy browser-based XSS auditors and Content Security Policy (CSP) headers to prevent inline script execution
• Monitor application logs for repeated submission attempts with unusual characters or encoded payloads in the password field

Monitoring Recommendations

• Enable verbose logging for the password management module to capture input validation failures and suspicious submissions
• Configure security information and event management (SIEM) alerts for patterns consistent with XSS exploitation attempts
• Regularly review access logs for anomalous activity patterns on the /tools/Password/add endpoint

How to Mitigate CVE-2025-70846

Immediate Actions Required

• Restrict access to the /tools/Password/add functionality to trusted users only until a patch is available
• Implement a web application firewall (WAF) with XSS filtering rules to block malicious payloads
• Review and audit all user input handling in the password management module for proper sanitization

Patch Information

No official patch information is currently available from the vendor. Users should monitor the AidiGu Project GitHub repository for security updates. Additionally, security researchers have documented this vulnerability in the CVE-2025-70846 Research repository which may contain additional technical details and mitigation guidance.

Workarounds

• Implement server-side input validation to reject or sanitize special characters in the password field before processing
• Apply output encoding (HTML entity encoding) when rendering user-supplied data in the browser
• Deploy Content Security Policy (CSP) headers to prevent inline script execution: Content-Security-Policy: default-src 'self'; script-src 'self'

# Example Content Security Policy header configuration for Apache
# Add to .htaccess or Apache configuration file
Header set Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; img-src 'self' data:; object-src 'none'; frame-ancestors 'self'"

# For Nginx, add to server block
# add_header Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; img-src 'self' data:; object-src 'none'; frame-ancestors 'self'";