Portabilis i-Diario CVE-2025-7870

No vendor-released patch has been identified at time of analysis, and the vendor has not responded to disclosure communications. Immediate compensating controls are required: (1) Implement strict Content Security Policy (CSP) headers with script-src 'self' to prevent inline script execution, blocking injected XSS payloads even if reflected. This prevents script execution but may break legitimate functionality relying on inline scripts - test thoroughly in staging. (2) Apply input validation on the Anexo parameter at the application layer: accept only alphanumeric characters and specific safe file extensions (e.g., .pdf, .jpg), rejecting anything containing HTML or script tags. Document the whitelist to avoid false positives. (3) Enforce output encoding: all user-supplied data rendered in HTML context must be HTML-entity-encoded (e.g., < becomes &lt;). This requires code-level fixes if the vendor does not patch. (4) Restrict access to i-Diario's justificativas-de-falta functionality to only authorized educational staff, using role-based access control to minimize the authenticated user base that can inject payloads. (5) Monitor access logs for suspicious Anexo parameter values containing script tags or HTML entities. If the vendor releases a patch, upgrade immediately and verify the Anexo parameter is properly sanitized. Escalate requests to the vendor (Portabilis) for an official security update through all available channels.