CVE-2025-67842 is a vulnerability classified under CWE-829 (Inclusion of Functionality from Untrusted Control Sphere) affecting the Mintlify Platform's Static Asset API prior to the patch date of November 15, 2025. The flaw arises because the platform allows any tenant's static assets to be served on any other tenant's documentation site via the subdomain parameter. This design flaw enables remote attackers, who have low-level privileges (PR:L), to inject arbitrary web scripts or HTML content into documentation sites of other tenants, effectively causing cross-tenant content injection. The vulnerability does not require user interaction (UI:N) and can be exploited remotely over the network (AV:N). The scope is changed (S:C), meaning the vulnerability affects resources beyond the initially vulnerable component, impacting confidentiality (C:L) and integrity (I:L) but not availability (A:N). The vulnerability could lead to information disclosure or manipulation of documentation content, potentially misleading users or exposing sensitive information. Although no public exploits are known, the vulnerability's nature makes it a concern for multi-tenant SaaS environments where tenant isolation is critical. The lack of patch links suggests that a fix may not yet be publicly available, emphasizing the need for immediate attention from affected organizations.

For European organizations, the impact of CVE-2025-67842 can be significant, especially for those relying on Mintlify for hosting internal or customer-facing documentation. The ability for an attacker to inject arbitrary scripts or HTML into documentation sites can lead to data leakage, misinformation, or phishing attacks targeting employees or customers. Confidentiality is at risk as attackers might access or manipulate sensitive documentation content. Integrity is compromised since attackers can alter displayed information, potentially causing operational errors or reputational damage. Although availability is not directly affected, the trustworthiness of documentation is undermined. Organizations in regulated sectors such as finance, healthcare, and government are particularly vulnerable due to strict compliance requirements around data protection and integrity. The multi-tenant nature of the platform means that a breach in one tenant's environment could cascade or affect others, raising concerns about cross-tenant data isolation. Given the medium severity and the requirement for low privilege authentication, the threat is moderate but warrants prompt mitigation to prevent escalation or exploitation.

To mitigate CVE-2025-67842, organizations using the Mintlify Platform should: 1) Immediately review and restrict access controls to ensure that only authorized users can manage or upload static assets; 2) Implement strict validation and sanitization of the subdomain parameter to prevent injection of untrusted content; 3) Enforce tenant isolation by configuring the platform or requesting vendor support to ensure assets are only served within their respective tenant contexts; 4) Monitor documentation sites for unusual or unauthorized content changes that could indicate exploitation attempts; 5) Apply any vendor patches or updates as soon as they become available; 6) Consider deploying Web Application Firewalls (WAFs) with rules to detect and block suspicious script injections targeting documentation URLs; 7) Conduct regular security assessments and penetration tests focusing on multi-tenant SaaS environments; 8) Educate users and administrators about the risks of cross-tenant vulnerabilities and the importance of secure asset management. These steps go beyond generic advice by focusing on tenant isolation, parameter validation, and proactive monitoring specific to the Mintlify Platform context.