CVE-2025-1754 in Community Edition
Summary
by MITRE • 06/26/2025
An issue has been discovered in GitLab CE/EE affecting all versions from 17.2 before 17.11.5, 18.0 before 18.0.3, and 18.1 before 18.1.1 that could have allowed unauthenticated attackers to upload arbitrary files to public projects by sending crafted API requests, potentially leading to resource abuse and unauthorized content storage.
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Analysis
by VulDB Data Team • 06/26/2025
This vulnerability in GitLab CE/EE represents a critical access control flaw that undermines the security of public project repositories. The issue stems from insufficient validation of file upload requests through the application programming interface, allowing unauthorized actors to bypass authentication mechanisms and directly upload malicious content to public projects. The vulnerability affects a broad range of versions including 17.2 through 17.11.4, 18.0 through 18.0.2, and 18.1 through 18.1.0, indicating a widespread impact across multiple release lines. This weakness fundamentally compromises the integrity of public project storage systems and represents a significant deviation from expected security boundaries that should protect repository contents from unauthorized modifications.
The technical implementation of this vulnerability involves a flaw in the API request processing logic where file upload endpoints fail to properly verify the authentication status of incoming requests. Attackers can exploit this by crafting specific API requests that appear to originate from legitimate sources while bypassing the normal authentication checks required for file operations. The vulnerability operates at the application layer and specifically targets the file upload functionality within GitLab's public project access controls. This represents a classic case of insufficient authorization checks where the system assumes that valid API requests are automatically authorized, creating a path for unauthenticated operations to succeed in contexts where they should be strictly prohibited.
The operational impact of this vulnerability extends beyond simple unauthorized file storage to encompass potential resource exhaustion and content injection attacks. Unauthenticated attackers can flood public projects with arbitrary files, consuming storage resources and potentially overwhelming system performance. The vulnerability also creates opportunities for malicious content injection that could be used to host phishing materials, exploit payloads, or other harmful content within the public project repositories. This type of resource abuse can significantly impact system availability and may create downstream security implications for users who interact with these compromised public projects. The vulnerability aligns with CWE-285, which addresses insufficient authorization issues in software systems, and represents a clear violation of the principle of least privilege in access control mechanisms.
Organizations using affected GitLab versions should implement immediate mitigations including applying the relevant security patches released by GitLab to address this vulnerability. The recommended remediation involves upgrading to versions 17.11.5, 18.0.3, or 18.1.1 respectively, which contain the necessary fixes for the authorization bypass. Additionally, administrators should review and tighten access controls for public projects, implement additional monitoring for unusual file upload activities, and consider implementing rate limiting for file upload operations. The ATT&CK framework categorizes this vulnerability under privilege escalation and resource consumption tactics, highlighting the multi-faceted nature of the threat. Organizations should also conduct thorough security assessments of their GitLab installations to identify any potential exploitation attempts and ensure that all public project access controls remain properly enforced.