A vulnerability has been found in code-projects Local Storage Todo App 1

CVE-2025-0228 is an XSS bug in code-projects Local Storage Todo App 1.0, specifically js-todo-app/index.html, where the Add input is reflected/executed without proper neutralization. The only affected version publicly identified is 1.0, and the vendor page describes the app as a simple educational HTML/CSS/JavaScript project that runs by opening index.html directly in a browser rather than as a hardened enterprise service.

The vendor's LOW 2.4 score is directionally right, and if anything reality is even less urgent for enterprise defenders. The decisive friction is not the XSS class itself; it is the combination of high privileges required, a toy/demo deployment model, no evidence of in-the-wild abuse, and a blast radius limited to one browser session/localStorage context rather than a central multi-user platform.

Why this verdict

• Requires privileged app access: vendor CVSS uses PR:H, which means this is already post-access and not an unauthenticated edge compromise
• Tiny exposed population: the product is an educational HTML/JS sample that the vendor says is run by opening index.html in a browser, so real enterprise deployment is rare
• Low blast radius: impact is browser/session/localStorage scoped, with no evidence of server-side code execution, tenant-wide takeover, or infrastructure compromise

Why not higher?

It is not higher because the attack path narrows fast: you need the exact sample app, a real deployment, and privileged access in that app context before the XSS matters. There is also no KEV listing, no campaign reporting, and no sign this sits on a meaningful number of internet-facing enterprise assets.

Why not lower?

It is not pure noise because the underlying bug appears genuine and a public PoC exists. If your developers copied this sample into an internal portal or repackaged it into a shared app, it can still enable session-level browser compromise and content tampering for that specific origin.

1. Document and suppress — If this CVE appears only in vulnerability feeds and you do not knowingly run this sample app, mark it no action required and record the rationale now. For an IGNORE verdict there is no noisgate mitigation SLA and no remediation SLA; this is governance hygiene, not emergency work.
2. Hunt for copied sample code — Search dev repos, shared drives, and ad hoc intranet sites for Local_Storage_Todo_App_In_JS_With_Source_Code, js-todo-app, or the vendor project title. Do this during normal backlog review, because the real risk is not the vendor sample itself but teams copying unsafe front-end patterns into internal apps.
3. Remove or isolate hobby deployments — If you find a live deployment, retire it or restrict it to a non-production sandbox with no SSO, no sensitive data, and no shared multi-user access. Treat that as routine cleanup rather than security incident response.
4. Enforce output encoding and CSP in internal web standards — Use this CVE as a coding-standard reminder: ban unsafe DOM sinks for user content and require a baseline Content Security Policy on internally developed web apps. That reduces recurrence across the broader estate, which matters more than this single sample project.

Run this on the host or workstation where the app files live, not on a network scanner. Invoke it with python3 check_cve_2025_0228.py /path/to/js-todo-app/index.html; no admin privileges are required, only read access to the file.

#!/usr/bin/env python3
# check_cve_2025_0228.py
# Detects likely vulnerable copies of code-projects Local Storage Todo App 1.0
# Output: VULNERABLE / PATCHED / UNKNOWN
# Exit codes: 0=PATCHED, 1=VULNERABLE, 2=UNKNOWN, 3=usage/error

import os
import re
import sys
from pathlib import Path

DANGEROUS_SINKS = [
    r'innerHTML\s*=',
    r'insertAdjacentHTML\s*\(',
    r'document\.write\s*\(',
    r'outerHTML\s*=',
]

APP_MARKERS = [
    r'todo',
    r'localStorage',
    r'add',
]

SAFE_HINTS = [
    r'textContent\s*=',
    r'createTextNode\s*\(',
    r'setAttribute\s*\(\s*["\']text',
]

def usage():
    print('UNKNOWN - usage: python3 check_cve_2025_0228.py /path/to/index.html')
    sys.exit(3)

def read_file(p: Path):
    try:
        return p.read_text(encoding='utf-8', errors='ignore')
    except Exception as e:
        print(f'UNKNOWN - cannot read file: {e}')
        sys.exit(2)

def has_any(patterns, text):
    return any(re.search(p, text, flags=re.IGNORECASE | re.MULTILINE) for p in patterns)

def main():
    if len(sys.argv) != 2:
        usage()

    target = Path(sys.argv[1])
    if not target.exists() or not target.is_file():
        print('UNKNOWN - target file does not exist')
        sys.exit(2)

    if target.name.lower() != 'index.html':
        print('UNKNOWN - target is not index.html')
        sys.exit(2)

    content = read_file(target)
    norm = ' '.join(content.split())

    app_like = has_any(APP_MARKERS, norm)
    dangerous = has_any(DANGEROUS_SINKS, norm)
    safe = has_any(SAFE_HINTS, norm)

    # Strong path clue from advisory
    path_hint = 'js-todo-app' in str(target).replace('\\', '/').lower()

    # Heuristic verdicts:
    # - VULNERABLE: looks like the sample app and contains unsafe DOM sinks
    # - PATCHED: looks like the app and uses safer text sinks without dangerous ones
    # - UNKNOWN: anything else
    if (app_like or path_hint) and dangerous:
        print('VULNERABLE - likely CVE-2025-0228 pattern present (unsafe DOM sink in todo app index.html)')
        sys.exit(1)

    if (app_like or path_hint) and safe and not dangerous:
        print('PATCHED - app markers present, but only safer text insertion patterns found')
        sys.exit(0)

    print('UNKNOWN - unable to confirm product/version or vulnerable sink pattern')
    sys.exit(2)

if __name__ == '__main__':
    main()

Sources

1. NVD CVE-2025-0228
2. OpenCVE record mirror for CVE-2025-0228
3. VulDB submission #474049
4. Vendor project page
5. CISA Known Exploited Vulnerabilities Catalog
6. JVNDB entry
7. INCIBE advisory
8. CVE Details summary with EPSS mirror