CVE-2021-33699
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedTask Hijacking is a vulnerability that affects the applications running on Android devices due to a misconfiguration in their AndroidManifest.xml with their Task Control features. This allows an unauthorized attacker or malware to takeover legitimate apps and to steal user's sensitive information.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceTask Hijacking vulnerability in Android apps caused by improper configuration of Task Control features in AndroidManifest.xml. Apps with misconfigured attributes like android:allowTaskReparenting or improper intent filter settings can have their tasks taken over by malicious applications. Attackers exploit this by hijacking the app's task to present fraudulent UIs and steal user credentials or sensitive data.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data= 3.2CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Adjacent
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
-
Identify Sap Fiori Client versionCheck the installed version of Sap Fiori Client on the Android device through Settings > Apps > Sap Fiori Client, or use 'adb shell pm list packages' and 'adb shell dumpsys package <package_name>' to retrieve version infoAffected if The installed version is exactly 3.2
-
Examine android:allowTaskReparenting in AndroidManifest.xmlDecompile the APK and inspect AndroidManifest.xml for android:allowTaskReparenting attributes set to true on activity elementsAffected if android:allowTaskReparenting="true" is present without corresponding task affinity controls
-
Review android:launchMode settingsDecompile the APK and inspect AndroidManifest.xml activity declarations for android:launchMode attributesAffected if launchMode is set to singleInstance or singleTask without proper task affinity configuration
-
Inspect intent filter configurationsDecompile the APK and examine intent-filter elements in AndroidManifest.xml for exported status and category definitionsAffected if Intent filters lack explicit android:exported="false" or use overly permissive category settings
-
Check task affinity configurationDecompile the APK and examine android:taskAffinity attributes on activity elements in AndroidManifest.xmlAffected if Task affinity is not defined or is set to a shared value that allows other apps to associate tasks
A user is affected if Sap Fiori Client version 3.2 is installed AND the AndroidManifest.xml contains misconfigured task control attributes (allowTaskReparenting, launchMode, or intent filters) that permit unauthorized task hijacking.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataReview and correct the android:allowTaskReparenting, android:launchMode, and intent filter configurations in AndroidManifest.xml to prevent unauthorized task takeover. Set appropriate task affinities and use android:excludeFromRecents or android:noHistory where appropriate.
- Consultation4.0 h
- Implementation2.0 h
- Testing3.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,152.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-33699 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2021-33699 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data