Podcast Player - Castbox
Castbox.FM - Radio & Podcast & AudioBooks · Build 11.26.1-260915290
Static checks identify review items, not a guarantee of safety.
Overview
6 finding categories to review
Podcast Player - Castbox (fm.castbox.audiobook.radio.podcast) scored grade B, 83 out of 100, in a static scan of version 11.26.1-260915290 on 2026-10-13. It has no high or critical findings, and 6 lower-severity finding categories across 10 occurrences. 20 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
mediumCleartext (HTTP) traffic permitted1 occurrence
Interpretation & review guidance
The manifest permits cleartext (HTTP) traffic. Data sent over plain HTTP can be read or tampered with on the network; modern apps should require HTTPS.
- 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.
mediumExported content provider without permission2 occurrences
Interpretation & review guidance
An exported content provider declares no permission. Other apps on the device may reach it — verify it enforces access control internally; this flags the attack surface, not a confirmed leak.
- Evidence
- 2 recorded occurrences in the analyzed APK. These are distinct stored findings, not a count of every source match.
- Verification
- Static detection; current reachability is not established.
lowAmazon S3 bucket reference3 occurrences
Interpretation & review guidance
A reference to an Amazon S3 bucket. Using cloud storage is normal — the risk exists only if the bucket allows anonymous listing/read, which requires a separate authorized assessment.
- Evidence
- 3 recorded occurrences 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
67 components recorded. Certificate parsing does not validate APK signature integrity.
Inspect build evidence →Findings
6 categories · 10 occurrences. Severity totals describe categories. Expand a finding for interpretation and review guidance.
mediumCleartext (HTTP) traffic permitted1 occurrence
Interpretation & review guidance
The manifest permits cleartext (HTTP) traffic. Data sent over plain HTTP can be read or tampered with on the network; modern apps should require HTTPS.
- 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
- Parsed app configuration
- Representative location
AndroidManifest.xml- Recorded match
android:usesCleartextTraffic="true"- Detector rule
manifest- Recorded file locations
AndroidManifest.xml
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.
mediumExported content provider without permission2 occurrences
Interpretation & review guidance
An exported content provider declares no permission. Other apps on the device may reach it — verify it enforces access control internally; this flags the attack surface, not a confirmed leak.
- Evidence
- 2 recorded occurrences 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
- Parsed app configuration
- Representative location
AndroidManifest.xml:fm.castbox.player.CastBoxPlayerProvider- Recorded match
CastBoxPlayerProvider (exported, no permission)- Detector rule
manifest- Recorded file locations
AndroidManifest.xml:fm.castbox.player.CastBoxPlayerProvider
2 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.
lowAmazon S3 bucket reference3 occurrences
Interpretation & review guidance
A reference to an Amazon S3 bucket. Using cloud storage is normal — the risk exists only if the bucket allows anonymous listing/read, which requires a separate authorized assessment.
- Evidence
- 3 recorded occurrences 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
classes5.dex- Recorded match
Pattern recorded; identifying value redacted.- Detector rule
s3_bucket_url- Recorded file locations
classes5.dex
3 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.
lowFirebase Realtime Database reference1 occurrence
Interpretation & review guidance
A Firebase Realtime Database URL. Nearly every app that uses Firebase ships one. It's only an exposure if the database rules are world-readable — that's what live verification checks.
- 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
Pattern recorded; identifying value redacted.- Detector rule
firebase_db- 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.
lowFirebase Storage bucket reference2 occurrences
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.
- Evidence
- 2 recorded occurrences 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
Pattern recorded; identifying value redacted.- Detector rule
firebase_storage_bucket- Recorded file locations
resources.arsc
2 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.
- 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.
Precise location Approx. location Camera Microphone
Requested permission inventory (36)
Data collection & flow (privacy signal, not part of the grade)
- Approximate location, Precise location requested while 12 ad/attribution SDK(s) are present (AppLovin, Chartboost, Google AdMob +9 more) — location commonly feeds ad targeting.
- Persistent-identifier APIs referenced in code (Advertising ID (AAID), Android ID, Device ID / IMEI) with 17 analytics/ad SDK(s) present — the mechanism used for cross-app profiling.
- Camera, Microphone, 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 comparison not recorded.
Trackers & SDKs (20 detected · privacy signal, not part of the grade)
Build & components
Scanned build 11.26.1-260915290. Store metadata may describe a newer release.
d3f82663696b38440e7c4ff69a5b0bbb1636551a7b0943e40f4e639c1a7ef8d3Signing certificate (who signed this build — factual, not part of the grade)
5e:fb:79:c6:02:4b:97:0c:74:f3:0a:20:12:aa:63:cb:01:81:40:96:6a:39:7e:70:9b:cb:11:f7:4f:d7:de:01The certificate fingerprint identifies the parsed signing certificate. Knowing this public fingerprint does not establish ownership or validate the APK signature.
Component inventory
67 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 | 1.3.1 | None recorded |
androidx.annotation:annotation-experimental | 1.4.0 | None recorded |
androidx.appcompat:appcompat | 1.3.1 | None recorded |
androidx.appcompat:appcompat-resources | 1.3.1 | None recorded |
androidx.asynclayoutinflater:asynclayoutinflater | 1.0.0 | None recorded |
androidx.browser:browser | 1.8.0 | None recorded |
androidx.cardview:cardview | 1.0.0 | None recorded |
androidx.coordinatorlayout:coordinatorlayout | 1.1.0 | None recorded |
androidx.core:core | 1.9.0 | None recorded |
androidx.core:core-ktx | 1.9.0 | None recorded |
androidx.core:core-splashscreen | 1.0.0-beta02 | None recorded |
androidx.cursoradapter:cursoradapter | 1.0.0 | None recorded |
androidx.customview:customview | 1.0.0 | None recorded |
androidx.customview:customview-poolingcontainer | 1.0.0 | None recorded |
androidx.databinding:baseAdapters | 8.10.1 | None recorded |
androidx.databinding:databindingKtx | 8.10.1 | None recorded |
androidx.databinding:library | 8.10.1 | None recorded |
androidx.databinding:viewbinding | 8.10.1 | None recorded |
androidx.datastore:datastore | 1.0.0 | None recorded |
androidx.datastore:datastore-preferences | 1.0.0 | None recorded |
androidx.documentfile:documentfile | 1.0.0 | None recorded |
androidx.drawerlayout:drawerlayout | 1.0.0 | None recorded |
androidx.dynamicanimation:dynamicanimation | 1.0.0 | None recorded |
androidx.exifinterface:exifinterface | 1.3.6 | None recorded |
androidx.fragment:fragment | 1.3.6 | None recorded |
androidx.gridlayout:gridlayout | 1.0.0 | 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.legacy:legacy-support-v13 | 1.0.0 | None recorded |
androidx.legacy:legacy-support-v4 | 1.0.0 | None recorded |
androidx.lifecycle:lifecycle-extensions | 2.2.0 | None recorded |
androidx.loader:loader | 1.0.0 | None recorded |
androidx.localbroadcastmanager:localbroadcastmanager | 1.0.0 | None recorded |
androidx.media:media | 1.6.0 | None recorded |
androidx.mediarouter:mediarouter | 1.2.2 | None recorded |
androidx.palette:palette | 1.0.0 | None recorded |
androidx.preference:preference | 1.1.1 | 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 | 1.3.0 | None recorded |
androidx.recyclerview:recyclerview | 1.3.0 | None recorded |
androidx.room:room-runtime | 2.2.5 | None recorded |
androidx.savedstate:savedstate | 1.2.1 | None recorded |
androidx.slidingpanelayout:slidingpanelayout | 1.0.0 | 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 | 1.0.0 | 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.viewpager2:viewpager2 | 1.0.0 | None recorded |
androidx.viewpager:viewpager | 1.0.0 | None recorded |
androidx.webkit:webkit | 1.11.0-alpha02 | None recorded |
androidx.work:work-runtime | 2.7.0 | None recorded |
androidx.work:work-runtime-ktx | 2.3.2 | None recorded |
androidx.work:work-rxjava2 | 2.3.2 | None recorded |
com.google.android.material:material | 1.2.1 | None recorded |
com.google.dagger:dagger | 2.53 | None recorded |
com.squareup.okhttp3:okhttp | 4.9.3 | None recorded |
kotlinx:coroutines_android | 1.7.3 | None recorded |
kotlinx:coroutines_core | 1.7.3 | None recorded |
kotlinx:coroutines_play_services | 1.7.3 | None recorded |
About this app · store information
About this app
Your podcast player. Listen & subscribe to all podcasts, a highly customized app
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 |
|---|---|---|---|
| 2026-10-13 08:27 UTC | 11.26.1-260915290 | 83 | B |
| 2026-10-06 07:44 UTC | 11.26.1-260915290 | 83 | B |
| 2026-09-29 07:43 UTC | 11.26.1-260915290 | 83 | B |
| 2026-09-16 04:03 UTC | 11.25.0-260714314 | 83 | B |
| 2026-09-08 12:12 UTC | 11.25.0-260714314 | 77 | B |
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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API users can request authenticated, scan-specific exports at /v1/scans/b011ce0e-2f2c-4e55-9dc9-b77a73565b47/findings.sarif (also coverage.json and proof.json).
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