CVE-2025-51862: TelegAI Chat IDOR Vulnerability Leads to XSS and Account Hijacking
Welcome back to the blog! Today, we're diving into CVE-2025-51862, a vulnerability affecting TelegAI, a platform offering chat services. This flaw could allow attackers to tamper with user conversations and inject malicious code.
🔍 TL;DR Summary
TelegAI's chat component suffers from an Insecure Direct Object Reference (IDOR) vulnerability. This allows attackers to potentially access and modify other users' conversations. They can also inject malicious content, including XSS payloads, leading to phishing attacks, user spoofing, and full account compromise.
🚨 Vulnerability Details
CVE ID
CVE-2025-51862
Description
An Insecure Direct Object Reference (IDOR) vulnerability exists in TelegAI (telegai.com) through May 26, 2025, within its chat functionality. This flaw enables attackers to manipulate other users' conversations. Further, they can inject malicious content and cross-site scripting (XSS) payloads, potentially leading to phishing attacks, user impersonation, and account takeover via XSS.
CVSS Score and Vector
The CVSS v3.1 score is 6.1 MEDIUM with a vector of CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
- Attack Vector (AV:N): Network – The vulnerability can be exploited over the network.
- Attack Complexity (AC:L): Low – The attack is easily executable.
- Privileges Required (PR:N): None – No privileges are required to exploit.
- User Interaction (UI:R): Required – User interaction is needed to trigger the vulnerability (e.g., clicking a malicious link).
- Scope (S:C): Changed – Exploiting the vulnerability can affect components beyond the vulnerable one.
- Confidentiality Impact (C:L): Low – Limited information disclosure.
- Integrity Impact (I:L): Low – Limited data modification.
- Availability Impact (A:N): None – No impact on system availability.
In short, this means an attacker can remotely, and easily, exploit this if a user clicks on something malicious within the TelegAI chat system. The attacker will have limited ability to modify data and view information.
Exploit Requirements
The attacker needs to trick a user into interacting with a malicious element in the chat, such as a crafted link or message containing XSS payload.
Affected Vendor, Product, Version
- Vendor: TelegAI (telegai.com)
- Product: Chat Component
- Version: Through 2025-05-26
CWE
CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
This means the application fails to properly sanitize user-supplied input before displaying it in a web page. An attacker can inject malicious scripts that will be executed in the victim's browser, potentially leading to session hijacking, defacement, or redirection to malicious sites.
📅 Timeline of Events
- 2025-05-26: End date of the affected version range.
- 2025-07-22: CVE assigned and vulnerability details published.
🧠 Exploitability & Real-World Risk
The IDOR vulnerability allows an attacker to tamper with other users' conversations by directly referencing chat object IDs. Combining this with the ability to inject XSS payloads makes the attack more potent. An attacker could craft a malicious message containing a link or script, and if a user clicks on it, their account could be compromised. This poses a significant risk, especially considering the potential for phishing attacks and account hijacking.
🛠️ Recommendations
- Apply Patch: Upgrade to a patched version of TelegAI that addresses the IDOR and XSS vulnerabilities.
- Input Sanitization: Implement strict input validation and sanitization to prevent XSS attacks.
- Access Control: Implement proper access controls to ensure users can only access resources they are authorized to view and modify.
- User Education: Educate users about the risks of clicking on suspicious links or interacting with untrusted content in the chat.
🧪 Technical Insight
The vulnerability stems from the application's failure to properly validate user access when accessing chat conversations. Each conversation is likely identified by an ID. Without proper access control checks, an attacker can manipulate the ID to access other users' conversations (IDOR). Then, by injecting raw HTML or Javascript code, they can run XSS payloads.
🙌 Credit to Researcher(s)
The vulnerability was discovered and reported by Secsys-FDU.
🔗 References
🧵 Tags
#CVE-2025-51862 #TelegAI #IDOR #XSS #AccountHijacking #Vulnerability #ChatSecurity
Summary: CVE-2025-51862 is an IDOR vulnerability in TelegAI's chat component, enabling attackers to tamper with conversations and inject XSS. This could lead to phishing, user spoofing, and account hijacking.
CVE ID: CVE-2025-51862
Risk Analysis: Successful exploitation could lead to account hijacking, data theft, and reputational damage for TelegAI.
Recommendation: Upgrade to a patched version of TelegAI, implement strict input validation, and educate users about the risks of clicking suspicious links.
Timeline
- 2025-05-26: End date of the affected version range.
- 2025-07-22: CVE assigned and vulnerability details published.