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Joist Invoice & Estimate App
com.joistapp.android.joist · Build 3.86.0
Analysis: complete. Static analysis completed for this build. A grade is not a guarantee of safety. Historical verification does not establish current reachability.
- Grade / score
- B · 76/100
- Finding categories
- 7
- Occurrences
- 10
- Scanned
- 2026-09-29T09:43:24.811Z
- Document issued
- 2026-10-13T22:52:42.162Z
- Historical verifications
- 0
Finding evidence
Open a category to review its occurrences. Printing includes all categories and occurrences.
Hardcoded HTTP Basic-auth credentials · high · 1 occurrence
Remove the hard-coded credential from the app package, rotate/revoke it immediately, and move the secret to a backend the app calls with per-user authentication.
CWE-798 · MASVS-STORAGE-1
Basic ••••••:•••••••• (redacted)
Amazon S3 bucket reference · low · 1 occurrence
Confirm the bucket/database denies anonymous read (enable auth / storage rules / RLS), then audit its contents for data already exposed while it was open.
CWE-200 · CWE-284 · MASVS-STORAGE-2
http://████.amazonaws.com/███
Firebase Realtime Database reference · low · 1 occurrence
Confirm the bucket/database denies anonymous read (enable auth / storage rules / RLS), then audit its contents for data already exposed while it was open.
CWE-200 · CWE-284 · MASVS-STORAGE-2
https://█████████.firebaseio.com/███
Google API key (client-shipped; restriction unverified) · low · 3 occurrences
Restrict the API key (application + API restrictions in Google Cloud Console); a client-shipped key is public, so restriction is the control.
CWE-798 · MASVS-STORAGE-1
AIza•••••••• (21–40 chars, redacted)AIza•••••••• (21–40 chars, redacted)AIza•••••••• (21–40 chars, redacted)
Firebase Storage bucket reference · low · 1 occurrence
Confirm the bucket/database denies anonymous read (enable auth / storage rules / RLS), then audit its contents for data already exposed while it was open.
CWE-200 · CWE-284 · MASVS-STORAGE-2
████████████
BIP39 wallet seed phrase (12 words, checksum valid) (third-party library artifact, shared across 12 unrelated developers) · low · 1 occurrence
A mnemonic seed phrase must never be embedded — any holder controls the wallet. Move funds to a new wallet immediately and never bundle key material.
CWE-312 · CWE-798 · MASVS-STORAGE-1 · MASVS-CRYPTO-2
BIP39 mnemonic (12 words) — redacted
Data Safety label omits Contacts · low · 2 occurrences
Update the Play Data Safety form to declare the observed data category, or remove the capability if the data is not actually collected.
CWE-359 · MASVS-PRIVACY-3
app can access contacts (Contacts); not in the declarationapp can access location (Approximate location); not in the declaration
Control coverage
Mapped static evidence does not establish a control pass. Manual assessment remains separate.
| Control | Requirement | Recorded status |
|---|---|---|
| MASVS-STORAGE-1 | The app securely stores sensitive data. | Review signal |
| MASVS-STORAGE-2 | The app prevents leakage of sensitive data. | Review signal |
| MASVS-CRYPTO-1 | The app employs current strong cryptography and uses it according to best practices. | No static findings · not a pass |
| MASVS-CRYPTO-2 | The app performs key management according to best practices. | Review signal |
| MASVS-AUTH-1 | The app uses secure authentication and authorization protocols. | Manual assessment |
| MASVS-AUTH-2 | The app performs local authentication securely. | Manual assessment |
| MASVS-AUTH-3 | The app secures sensitive operations with additional authentication. | Manual assessment |
| MASVS-NETWORK-1 | The app secures all network traffic according to current best practices. | No static findings · not a pass |
| MASVS-NETWORK-2 | The app verifies the identity of the remote endpoint (e.g. certificate pinning). | No static findings · not a pass |
| MASVS-PLATFORM-1 | The app uses IPC mechanisms securely. | No static findings · not a pass |
| MASVS-PLATFORM-2 | The app uses WebViews securely. | No static findings · not a pass |
| MASVS-PLATFORM-3 | The app uses the user interface securely. | Manual assessment |
| MASVS-CODE-1 | The app requires an up-to-date platform version. | No static findings · not a pass |
| MASVS-CODE-2 | The app has a mechanism for enforcing updates. | Manual assessment |
| MASVS-CODE-3 | The app only uses software components without known vulnerabilities. | No static findings · not a pass |
| MASVS-CODE-4 | The app validates and sanitizes all untrusted inputs and follows secure-coding practice. | No static findings · not a pass |
| MASVS-RESILIENCE-1 | The app validates the integrity of the platform. | Manual assessment |
| MASVS-RESILIENCE-2 | The app implements anti-tampering mechanisms. | Manual assessment |
| MASVS-RESILIENCE-3 | The app implements anti-static-analysis mechanisms. | Manual assessment |
| MASVS-RESILIENCE-4 | The app implements anti-dynamic-analysis techniques. | Manual assessment |
| MASVS-PRIVACY-1 | The app minimizes access to sensitive data and resources. | No static findings · not a pass |
| MASVS-PRIVACY-2 | The app prevents identification of the user. | No static findings · not a pass |
| MASVS-PRIVACY-3 | The app is transparent about data collection and usage. | Review signal |
| MASVS-PRIVACY-4 | The app offers user control over their data. | Manual assessment |
Build identity and signature
- Scan ID
- 2f91d2c8-f339-4815-98b6-4b345d493ccd
- APK SHA-256
9438fea80dc7981784fe06c7fc148f2178e53070025b6c4050a960b4743f2e25- Capsule SHA-256
0a2f9ae38b114bdae435765910d3155b61ac7e2c6b9576021dd2183110eb60fb- Signing key
- IE6LeZNX4dAAPLGr
Verify the signed JSON at apk-scanner.com/verify. This printed view is a presentation of the signed record; the JSON is the verification artifact.