CVE-2025-55750 in Gitpod
Summary
by MITRE • 08/29/2025
Gitpod is a developer platform for cloud development environments. In versions before main-gha.33628 for both Gitpod Classic and Gitpod Classic Enterprise, OAuth integration with Bitbucket in certain conditions allowed a crafted link to expose a valid Bitbucket access token via the URL fragment when clicked by an authenticated user. This resulted from how Bitbucket returned tokens and how Gitpod handled the redirect flow. The issue was limited to Bitbucket (GitHub and GitLab integrations were not affected), required user interaction, and has been mitigated through redirect handling and OAuth logic hardening. The issue was resolved in main-gha.33628 and later. There are no workarounds.
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Analysis
by VulDB Data Team • 08/29/2025
The vulnerability described in CVE-2025-55750 affects Gitpod's cloud development platform and specifically targets the OAuth integration with Bitbucket repositories. This security flaw represents a critical issue in the platform's authentication handling mechanism, where a malicious actor could craft a specially designed link that would inadvertently expose a valid Bitbucket access token through the URL fragment when clicked by an authenticated Gitpod user. The vulnerability is particularly concerning because it leverages the inherent trust relationship between Gitpod and Bitbucket during the OAuth authorization flow, creating a potential vector for credential exposure without requiring any sophisticated attack techniques beyond link crafting.
The technical root cause of this vulnerability stems from how Bitbucket handles token delivery within its OAuth redirect flow and how Gitpod's authentication system processes these redirects. When users authenticate through Bitbucket, the access token is typically returned in the URL fragment rather than the query parameters, which is a standard OAuth 2.0 practice for security reasons. However, Gitpod's implementation failed to properly sanitize or handle these URL fragments, allowing the token to be exposed in a manner that could be captured or transmitted by the application. This flaw aligns with CWE-200, which addresses the exposure of sensitive information, and represents a specific case of improper input validation during OAuth flow handling. The vulnerability specifically exploited the redirect URI handling logic, where the application failed to strip or properly process the fragment component containing the access token.
The operational impact of this vulnerability is significant for organizations using Gitpod Classic and Gitpod Classic Enterprise platforms with Bitbucket integrations. An attacker could craft malicious links that, when clicked by authenticated users, would result in the exposure of valid Bitbucket access tokens that could then be used to access and potentially modify repositories, perform operations on behalf of users, or even escalate privileges within the Bitbucket ecosystem. The requirement for user interaction makes this a phishing or social engineering vector rather than an automated attack, but the potential damage remains substantial given that these tokens could provide broad access to source code repositories and related development resources. The vulnerability was limited to Bitbucket integration, which means that GitHub and GitLab integrations were unaffected, but this limitation does not reduce the overall risk for organizations relying on Bitbucket for their source control management.
The security implications extend beyond simple credential exposure, as the compromised tokens could enable unauthorized access to sensitive development environments and source code repositories. This vulnerability demonstrates the critical importance of proper OAuth flow handling and input sanitization in cloud development platforms where multiple authentication systems interoperate. Organizations using Gitpod with Bitbucket integration faced a potential risk of unauthorized access to their code repositories, which could lead to data breaches, intellectual property exposure, or disruption of development workflows. The mitigation implemented by Gitpod in version main-gha.33628 involved strengthening the redirect handling logic and hardening the OAuth processing flow to ensure that URL fragments containing access tokens are properly sanitized or discarded before being processed by the application. This fix addresses the underlying technical flaw and prevents similar vulnerabilities from occurring in the future, aligning with ATT&CK technique T1566 for social engineering and T1078 for valid accounts, as the vulnerability exploited legitimate user authentication to gain access to additional resources. The lack of workarounds for this specific vulnerability underscores the necessity of updating to the patched version to ensure complete protection against this particular threat vector.