@app.route('/api/template/update', methods=['POST']) @auth_required # Populates current_user context def update_template_secure(): template_id = request.json.get('template_id') new_data = request.json.get('data') # Fetch template and verify ownership template = db.execute("SELECT owner_id FROM templates WHERE id = ?", (template_id,)).fetchone() if not template: return "error": "Template not found", 404 if template['owner_id'] != current_user.id: return "error": "Unauthorized action", 403 db.execute("UPDATE templates SET data = ? WHERE id = ?", (new_data, template_id)) return "status": "success" Use code with caution. 3. Recommended Bug Bounty Methodology for CapCut
Up to $15,000 or more for severe vulnerabilities like RCE without user interaction . Common "Security Notice" Fixes for Users
I’m grateful to the CapCut security team for their quick response and for maintaining a transparent bounty program. Check out the CapCut Help Center to see current known issues and community guides. [11, 14] Want to share your own fix? If you'd like me to help you customize this post, tell me:
Always validate the target file path using canonical paths before writing files to the disk. Ensure the destination directory remains strictly within the intended sandbox. capcut bug bounty fix
Key requirements for submissions include:
Always resolve the absolute path and ensure it strictly resides within the designated safe directory.
Check if the fix simply blocked a specific payload or addressed the underlying architectural flaw. (e.g., if an XSS payload was blocked, check if onerror still works). Recommended Bug Bounty Methodology for CapCut Up to
Reporting a bug to (CapCut's parent company) requires a clear, professional report. I submitted my findings through their official portal. Severity Rating: [e.g., Low / Medium / High] Response Time: The team responded within [Number] days.
Recent user reports often highlight a "Security Notice" within the app, which can sometimes be mistaken for a security breach but is often an integrity check. Key fixes for CapCut security-related issues include:
If you have successfully identified and fixed a bug within CapCut's ecosystem—especially one eligible for a reward—sharing your journey through a blog post is a great way to build your technical profile. [11, 14] Want to share your own fix
While CapCut itself has not experienced widespread public security incidents as a first-party application, researchers and security firms have identified several classes of vulnerabilities and related threats that are worth investigating:
If native functions are exposed to WebViews via JavaScript bridges, strictly restrict which origins can invoke them. Use @JavascriptInterface selectively on Android.
The financial rewards are compelling—with critical vulnerabilities earning up to 200,000 yuan—but the true value lies in contributing to the security of a platform used by hundreds of millions of creators worldwide. Whether you're hunting business logic flaws in subscription validation, fuzzing media parsing libraries, or discovering API misconfigurations, your work makes CapCut safer for everyone.
| Component | Potential Bug Types | |-----------|----------------------| | | XSS, CSRF, subdomain takeover, insecure direct object references (IDOR), rate limiting issues | | Mobile app (Android/iOS) | Deep link hijacking, insecure data storage, root/jailbreak detection bypass, SSRF via custom URI schemes | | Desktop app (Windows/Mac) | Local file inclusion, update mechanism MITM, inter-process communication (IPC) vulnerabilities | | Cloud / API | API key exposure, broken object level authorization, excessive data exposure, JWT issues | | Asset upload / export | SVG/XML injection, ZIP traversal, malicious template import |