Description
An improper access control vulnerability in danny-avila/librechat versions prior to 0.7.6 allows authenticated users to delete other users' prompts via the groupid parameter. This issue occurs because the endpoint does not verify whether the provided prompt ID belongs to the current user.
EPSS Score:
0%
Comprehensive Technical Analysis of EUVD-2025-7052
1. Vulnerability Assessment and Severity Evaluation
Vulnerability Description:
The vulnerability in question is an improper access control issue in the danny-avila/librechat software, specifically affecting versions prior to 0.7.6. This flaw allows authenticated users to delete other users' prompts via the groupid parameter due to a lack of verification on whether the provided prompt ID belongs to the current user.
Severity Evaluation:
The vulnerability has a CVSS Base Score of 9.4, which is considered critical. The CVSS vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L indicates the following:
- Attack Vector (AV): Network (N)
- Attack Complexity (AC): Low (L)
- Privileges Required (PR): None (N)
- User Interaction (UI): None (N)
- Scope (S): Unchanged (U)
- Confidentiality (C): High (H)
- Integrity (I): High (H)
- Availability (A): Low (L)
This high severity score underscores the critical nature of the vulnerability, which can lead to significant impacts on confidentiality and integrity.
2. Potential Attack Vectors and Exploitation Methods
Attack Vectors:
- Authenticated Users: An attacker with valid credentials can exploit this vulnerability to delete prompts belonging to other users.
- Network Access: The attack can be carried out over the network, making it accessible to remote attackers.
Exploitation Methods:
- Parameter Manipulation: By manipulating the
groupidparameter in API requests, an attacker can target specific prompts for deletion. - Automated Scripts: Attackers could use automated scripts to systematically delete prompts, causing widespread disruption.
3. Affected Systems and Software Versions
Affected Software:
danny-avila/librechatversions prior to 0.7.6.
Systems:
- Any system running the affected versions of
danny-avila/librechat.
4. Recommended Mitigation Strategies
Immediate Mitigation:
- Upgrade Software: Upgrade to
danny-avila/librechatversion 0.7.6 or later, which includes the fix for this vulnerability. - Access Controls: Implement additional access controls to verify user permissions before allowing deletion of prompts.
Long-term Mitigation:
- Code Review: Conduct a thorough code review to identify and fix similar access control issues.
- Security Training: Provide security training for developers to ensure they understand the importance of proper access control mechanisms.
- Regular Updates: Ensure that all software dependencies are regularly updated to the latest versions.
5. Impact on European Cybersecurity Landscape
Regulatory Compliance:
- GDPR: This vulnerability could lead to unauthorized access and manipulation of user data, potentially violating GDPR regulations.
- NIS Directive: Organizations operating critical infrastructure may be required to report such vulnerabilities and take immediate action to mitigate risks.
Economic Impact:
- Business Disruption: Unauthorized deletion of prompts can disrupt business operations and lead to financial losses.
- Reputation Damage: Organizations experiencing data breaches due to this vulnerability may suffer reputational damage.
6. Technical Details for Security Professionals
Technical Analysis:
- Vulnerable Endpoint: The endpoint handling the deletion of prompts does not verify the ownership of the prompt ID, allowing authenticated users to delete any prompt.
- Exploit Code: An attacker can craft a malicious HTTP request to the vulnerable endpoint, specifying a
groupidparameter that does not belong to them.
Example Exploit:
DELETE /api/prompts?groupid=12345 HTTP/1.1
Host: vulnerable-librechat-server.com
Authorization: Bearer <authenticated_token>
Mitigation Code:
def delete_prompt(user_id, prompt_id):
prompt = get_prompt_by_id(prompt_id)
if prompt.owner_id != user_id:
raise PermissionError("You do not have permission to delete this prompt.")
delete_prompt_from_database(prompt_id)
References:
By addressing this vulnerability promptly and comprehensively, organizations can mitigate the risks associated with unauthorized access and data manipulation, thereby enhancing their overall cybersecurity posture.