CVE-2020-10980 in Community Edition
Summary
by MITRE
GitLab EE/CE 8.0.rc1 to 12.9 is vulnerable to a blind SSRF in the FogBugz integration.
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Analysis
by VulDB Data Team • 08/18/2025
GitLab versions 8.0.rc1 through 12.9 contain a critical blind server-side request forgery vulnerability within their FogBugz integration functionality. This vulnerability arises from insufficient input validation and sanitization of user-provided parameters that are used to construct HTTP requests to external systems. The flaw allows attackers to manipulate the integration's request handling mechanism to make unauthorized requests to internal or external systems that would otherwise be inaccessible to them. The vulnerability is classified as blind SSRF because the attacker cannot directly observe the response from the target system, making detection and exploitation more challenging.
The technical implementation of this vulnerability stems from the way GitLab processes configuration parameters for the FogBugz integration feature. When administrators configure the integration, they provide connection details including hostnames and endpoints that are then used to establish connections with the FogBugz system. The vulnerability occurs because the application fails to properly validate or sanitize these parameters before constructing outbound HTTP requests, allowing attackers to inject malicious hostnames or IP addresses. This flaw is particularly dangerous in environments where GitLab instances have access to internal networks or restricted systems that are not directly exposed to external traffic.
The operational impact of this vulnerability extends beyond simple information disclosure or system compromise. Attackers can leverage this blind SSRF to perform reconnaissance activities within the internal network by targeting internal services that may not be directly accessible from the internet. The vulnerability enables potential exploitation of internal systems that are normally protected by firewalls or network segmentation. Additionally, the attack surface includes potential for data exfiltration, service disruption, or further lateral movement within the network infrastructure. The vulnerability affects both GitLab Enterprise Edition and Community Edition installations, making it a widespread concern across the GitLab user base.
Organizations should implement immediate mitigations including disabling the FogBugz integration feature if not actively used, implementing network segmentation to restrict outbound connections from GitLab servers, and deploying web application firewalls to monitor and filter suspicious outbound requests. The vulnerability aligns with CWE-918 which specifically addresses server-side request forgery flaws, and maps to ATT&CK technique T1071.004 for application layer protocol traffic. Security teams should also consider implementing outbound traffic controls and monitoring for unusual connection patterns that might indicate exploitation attempts. Regular updates to GitLab installations remain critical as this vulnerability was patched in subsequent releases, demonstrating the importance of maintaining current security configurations and applying patches promptly.