Overview
In today’s interconnected world, cybersecurity vulnerabilities pose a significant threat to both personal and professional information. One such vulnerability is CVE-2025-52571, a significant flaw in Hikka, a popular Telegram userbot. This vulnerability affects all users who are operating on Hikka versions below 1.6.2, and it opens the door for unauthenticated attackers to gain access to both the victim’s Telegram account and the server where the userbot is hosted. The severity of this vulnerability, coupled with the popularity of Telegram as a communication platform, underscores the importance of immediate action to mitigate the risk.
Vulnerability Summary
CVE ID: CVE-2025-52571
Severity: Critical (CVSS Score 9.6)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Unauthorized access to Telegram account and server, potential system compromise or data leakage
Affected Products
Escape the Surveillance Era
Most apps won’t tell you the truth.
They’re part of the problem.
Phone numbers. Emails. Profiles. Logs.
It’s all fuel for surveillance.
Ameeba Chat gives you a way out.
- • No phone number
- • No email
- • No personal info
- • Anonymous aliases
- • End-to-end encrypted
Chat without a trace.
Product | Affected Versions
Hikka Userbot | All versions below 1.6.2
How the Exploit Works
The vulnerability in Hikka userbot is a flaw in the authentication process. An attacker can exploit this vulnerability by sending specially crafted requests to the Hikka server. These requests bypass the existing authentication mechanisms, allowing the attacker to gain unauthorized access to both the Telegram account associated with the bot and the server where the bot is hosted. This access can be leveraged to compromise the system or leak sensitive data.
Conceptual Example Code
Below is a conceptual demonstration of how the vulnerability might be exploited. Please note that this is a simplified hypothetical example and real-world exploitation might involve more complex tactics:
POST /hikka/login HTTP/1.1
Host: vulnerable-hikka-bot.com
Content-Type: application/json
{ "username": "victim", "password": "", "force_auth": true }In this example, the attacker sends a POST request to the `/hikka/login` endpoint with a blank password and the `force_auth` flag set to true. This forces the server to authenticate the provided username without validating the password, granting the attacker access to the victim’s account.
Mitigation Guidance
The issue has been patched in version 1.6.2 of the Hikka userbot. All users are strongly advised to update their Hikka version to 1.6.2 or newer immediately. No known workarounds are available. In case updating the userbot is not immediately possible, users can apply a Web Application Firewall (WAF) or Intrusion Detection System (IDS) as temporary mitigation to monitor and block suspicious requests.