RBX Wallpaper 4k HD
Bijay Poudel · Build 5.1.0
Static checks identify review items, not a guarantee of safety.
Backend checks: 2 unauthenticated read checks against backends referenced in this build — 2 answered. Each check describes one request at the recorded scan time and does not establish the backend's current state.
Overview
2 high or critical finding categories to review
RBX Wallpaper 4k HD (com.bijay.roblox_wallpaper) scored grade F, 0 out of 100, in a static scan of version 5.1.0 on 2026-11-04. It has 2 high or critical finding categories of 3, across 3 occurrences. 2 findings were confirmed live: an anonymous request reached a backend the app references and it answered without authentication. No credential was used and no stored data was read. 6 tracking SDKs are present in the package, which describes what ships, not what runs or what it sends. This is static analysis of a single build: it does not observe the app running and does not establish that any data is exposed.
Start with these findings
criticalCloud Firestore publicly readable — confirmed reachable1 occurrence
Interpretation & review guidance
Cloud Firestore was confirmed publicly readable — the database's security rules allow anyone to read documents without authentication. This is a real data-exposure risk; lock the rules to require auth.
Reference: CWE-200 · CWE-284 · MASVS-STORAGE-2 — what the control asks for, and other apps with the same finding.
- Evidence
- 1 recorded occurrence in the analyzed APK. These are distinct stored findings, not a count of every source match.
- Verification
- 1 historically verified occurrence at the recorded scan time. Current reachability is not established.
criticalFirebase Storage bucket reference — confirmed publicly readable1 occurrence
Interpretation & review guidance
A Firebase Cloud Storage bucket reference (the default <project>.appspot.com). Storing user files here is normal — it's only an exposure if the Storage security rules allow public read/list, which live verification tests.
Remediation: Fix a publicly readable Firebase database →
Reference: CWE-200 · CWE-284 · MASVS-STORAGE-2 — what the control asks for, and other apps with the same finding.
- Evidence
- 1 recorded occurrence in the analyzed APK. These are distinct stored findings, not a count of every source match.
- Verification
- 1 historically verified occurrence at the recorded scan time. Current reachability is not established.
lowGoogle API key (client-shipped; restriction unverified)1 occurrence
Interpretation & review guidance
Android apps are designed to ship Google API keys in the client; Google restricts them by app signing certificate + enabled API. This is only a problem if the key is left unrestricted — presence alone is expected, not an exposure.
Remediation: How to store secrets in a mobile app (without hardcoding) →
Reference: CWE-798 · MASVS-STORAGE-1 — what the control asks for, and other apps with the same finding.
- Evidence
- 1 recorded occurrence in the analyzed APK. These are distinct stored findings, not a count of every source match.
- Verification
- Static detection; current reachability is not established.
Build & components
62 components recorded. Certificate parsing does not validate APK signature integrity.
Inspect build evidence →Findings
3 categories · 3 occurrences. Severity totals describe categories. Expand a finding for interpretation and review guidance.
criticalCloud Firestore publicly readable — confirmed reachable1 occurrence
Interpretation & review guidance
Cloud Firestore was confirmed publicly readable — the database's security rules allow anyone to read documents without authentication. This is a real data-exposure risk; lock the rules to require auth.
Reference: CWE-200 · CWE-284 · MASVS-STORAGE-2 — what the control asks for, and other apps with the same finding.
- Evidence
- 1 recorded occurrence in the analyzed APK. These are distinct stored findings, not a count of every source match.
- Verification
- 1 historically verified occurrence at the recorded scan time. Current reachability is not established.
Evidence preview
- Evidence type
- Static string match
- Representative location
firestore/roblox-wallpaper-24399- Recorded match
Pattern recorded; identifying value redacted.
1 recorded findings have inspectable metadata. Duplicate matches may share a representative location.
Review whether this belongs to intended app functionality or a bundled library. A static match does not establish runtime impact.
Preview evidence and Pro toolsSearch recorded evidence and save private review notes with Pro. $99/month plus applicable tax.
criticalFirebase Storage bucket reference — confirmed publicly readable1 occurrence
Interpretation & review guidance
A Firebase Cloud Storage bucket reference (the default <project>.appspot.com). Storing user files here is normal — it's only an exposure if the Storage security rules allow public read/list, which live verification tests.
Remediation: Fix a publicly readable Firebase database →
Reference: CWE-200 · CWE-284 · MASVS-STORAGE-2 — what the control asks for, and other apps with the same finding.
- Evidence
- 1 recorded occurrence in the analyzed APK. These are distinct stored findings, not a count of every source match.
- Verification
- 1 historically verified occurrence at the recorded scan time. Current reachability is not established.
Evidence preview
- Evidence type
- Static string match
- Representative location
resources.arsc- Recorded match
Pattern recorded; identifying value redacted.- Detector rule
firebase_storage_bucket- Recorded file locations
resources.arsc
1 recorded findings have inspectable metadata. Duplicate matches may share a representative location.
Review whether this belongs to intended app functionality or a bundled library. A static match does not establish runtime impact.
Preview evidence and Pro toolsSearch recorded evidence and save private review notes with Pro. $99/month plus applicable tax.
lowGoogle API key (client-shipped; restriction unverified)1 occurrence
Interpretation & review guidance
Android apps are designed to ship Google API keys in the client; Google restricts them by app signing certificate + enabled API. This is only a problem if the key is left unrestricted — presence alone is expected, not an exposure.
Remediation: How to store secrets in a mobile app (without hardcoding) →
Reference: CWE-798 · MASVS-STORAGE-1 — what the control asks for, and other apps with the same finding.
- Evidence
- 1 recorded occurrence in the analyzed APK. These are distinct stored findings, not a count of every source match.
- Verification
- Static detection; current reachability is not established.
Evidence preview
- Evidence type
- Static string match
- Representative location
resources.arsc- Recorded match
AIza•••••••• (21–40 chars, redacted)- Detector rule
google_api_key- Recorded file locations
resources.arsc
1 recorded findings have inspectable metadata. Duplicate matches may share a representative location.
Review whether this belongs to intended app functionality or a bundled library. A static match does not establish runtime impact.
Preview evidence and Pro toolsSearch recorded evidence and save private review notes with Pro. $99/month plus applicable tax.
No categories match these filters. Clear the search or choose all severities.
Privacy signals
Capabilities and bundled software do not prove that data was collected or transmitted.
Storage
Requested permission inventory (17)
Data collection & flow (privacy signal, not part of the grade)
- Persistent-identifier APIs referenced in code (Advertising ID (AAID), Android ID, Device ID / IMEI) with 4 analytics/ad SDK(s) present — the mechanism used for cross-app profiling.
- Photos & files data requested with third-party analytics/ad SDKs present.
This maps what the app can access (permissions it requests, identifier APIs its code references) to the third parties bundled in it. It reflects capability and SDK presence — not proof that a specific value was transmitted.
Data Safety: declared vs observed (Play label vs our analysis)
We compare the developer's Google Play Data Safety declaration with what the binary can actually do (permissions it requests, identifier APIs and third-party SDKs it ships). A mismatch is a capability signal to confirm — a requested permission is not proof of collection.
Trackers & SDKs (6 detected · privacy signal, not part of the grade)
Build & components
Scanned build 5.1.0. Store metadata may describe a newer release.
c364bfc83c1fbe4c9ea40fc3773ee6f562e2880c6f8b9dfcfd4dc14f6e45d335Signing certificate (who signed this build — factual, not part of the grade)
72:32:c6:c8:01:0d:10:4b:fa:04:a2:77:fe:f3:40:eb:1e:ba:9d:f0:40:af:bc:92:62:a2:4e:ee:c7:6c:d6:b1The certificate fingerprint identifies the parsed signing certificate. Knowing this public fingerprint does not establish ownership or validate the APK signature.
Component inventory
62 components. Advisory matching covers a curated set; no match is not proof that a component is vulnerability-free.
| Component | Version | Advisory matches |
|---|---|---|
androidx.activity:activity | 1.8.1 | None recorded |
androidx.activity:activity-ktx | 1.8.1 | None recorded |
androidx.annotation:annotation-experimental | 1.4.1 | None recorded |
androidx.appcompat:appcompat | 1.2.0 | None recorded |
androidx.appcompat:appcompat-resources | 1.2.0 | None recorded |
androidx.asynclayoutinflater:asynclayoutinflater | 1.0.0 | None recorded |
androidx.browser:browser | 1.8.0 | None recorded |
androidx.coordinatorlayout:coordinatorlayout | 1.0.0 | None recorded |
androidx.core:core | 1.13.1 | None recorded |
androidx.core:core-ktx | 1.13.1 | None recorded |
androidx.cursoradapter:cursoradapter | 1.0.0 | None recorded |
androidx.customview:customview | 1.1.0 | None recorded |
androidx.datastore:datastore | 1.1.3 | None recorded |
androidx.datastore:datastore-core | 1.1.3 | None recorded |
androidx.datastore:datastore-preferences | 1.1.3 | None recorded |
androidx.documentfile:documentfile | 1.0.0 | None recorded |
androidx.drawerlayout:drawerlayout | 1.0.0 | None recorded |
androidx.fragment:fragment | 1.7.1 | None recorded |
androidx.fragment:fragment-ktx | 1.7.1 | None recorded |
androidx.interpolator:interpolator | 1.0.0 | None recorded |
androidx.legacy:legacy-support-core-ui | 1.0.0 | None recorded |
androidx.legacy:legacy-support-core-utils | 1.0.0 | None recorded |
androidx.lifecycle:lifecycle-livedata | 2.7.0 | None recorded |
androidx.lifecycle:lifecycle-livedata-core | 2.7.0 | None recorded |
androidx.lifecycle:lifecycle-livedata-core-ktx | 2.7.0 | None recorded |
androidx.lifecycle:lifecycle-process | 2.7.0 | None recorded |
androidx.lifecycle:lifecycle-runtime | 2.7.0 | None recorded |
androidx.lifecycle:lifecycle-runtime-ktx | 2.7.0 | None recorded |
androidx.lifecycle:lifecycle-service | 2.7.0 | None recorded |
androidx.lifecycle:lifecycle-viewmodel | 2.7.0 | None recorded |
androidx.lifecycle:lifecycle-viewmodel-ktx | 2.7.0 | None recorded |
androidx.lifecycle:lifecycle-viewmodel-savedstate | 2.7.0 | None recorded |
androidx.loader:loader | 1.0.0 | None recorded |
androidx.localbroadcastmanager:localbroadcastmanager | 1.0.0 | None recorded |
androidx.preference:preference | 1.2.1 | None recorded |
androidx.print:print | 1.0.0 | None recorded |
androidx.privacysandbox.ads:ads-adservices | 1.0.0-beta05 | None recorded |
androidx.privacysandbox.ads:ads-adservices-java | 1.0.0-beta05 | None recorded |
androidx.profileinstaller:profileinstaller | 1.3.1 | None recorded |
androidx.recyclerview:recyclerview | 1.0.0 | None recorded |
androidx.room:room-runtime | 2.2.5 | None recorded |
androidx.savedstate:savedstate | 1.2.1 | None recorded |
androidx.savedstate:savedstate-ktx | 1.2.1 | None recorded |
androidx.slidingpanelayout:slidingpanelayout | 1.2.0 | None recorded |
androidx.sqlite:sqlite | 2.1.0 | None recorded |
androidx.sqlite:sqlite-framework | 2.1.0 | None recorded |
androidx.startup:startup-runtime | 1.1.1 | None recorded |
androidx.swiperefreshlayout:swiperefreshlayout | 1.0.0 | None recorded |
androidx.tracing:tracing | 1.2.0 | None recorded |
androidx.transition:transition | 1.4.1 | None recorded |
androidx.vectordrawable:vectordrawable | 1.1.0 | None recorded |
androidx.vectordrawable:vectordrawable-animated | 1.1.0 | None recorded |
androidx.versionedparcelable:versionedparcelable | 1.1.1 | None recorded |
androidx.viewpager:viewpager | 1.0.0 | None recorded |
androidx.webkit:webkit | 1.14.0 | None recorded |
androidx.window.extensions.core:core | 1.0.0 | None recorded |
androidx.window:window | 1.2.0 | None recorded |
androidx.window:window-java | 1.2.0 | None recorded |
androidx.work:work-runtime | 2.7.0 | None recorded |
kotlinx:coroutines_android | 1.9.0 | None recorded |
kotlinx:coroutines_core | 1.9.0 | None recorded |
kotlinx:coroutines_play_services | 1.9.0 | None recorded |
About this app · store information
About this app
HD RBX Wallpaper
Screenshots
Scan history
Each row is an observed scan. Gaps between scans do not establish how long a finding existed.
| Scanned (UTC) | Build | Score | Grade |
|---|---|---|---|
| 2026-11-04 07:37 UTC | 5.1.0 | 0 | F |
Export & share
Exports describe the recorded assessment. Signed evidence proves origin and integrity, not completeness or safety.
Coverage & gap matrix · Verify signed evidence
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