ITFlow Vulnerable to Authenticated Cross-Tenant Credential Disclosure via Unprotected Credential Modal

ITFlow provides an IT documentation, ticketing and accounting system for small managed service providers. Prior to version 26.05, low-privileged authenticated agent can retrieve plaintext credentials and TOTP secrets belonging to another client by directly requesting the credential edit modal with an arbitrary `credential_id`. The endpoint does not enforce client scoping or object-level authorization before loading and decrypting the credential record. Version 26.05 fixes the issue.