CVE-2021-41011
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 · uneditedLINE client for iOS before 11.15.0 might expose authentication information for a certain service to external entities under certain conditions. This is usually impossible, but in combination with a server-side bug, attackers could get this 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 confidenceThe LINE iOS client before version 11.15.0 has a vulnerability that could expose authentication credentials for a specific service to external attackers under certain conditions. While exploitation is described as usually impossible, when combined with a server-side bug, attackers could potentially obtain authentication information.
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< 11.15.0CVSS 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
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:N/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.
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Locate the installed LINE iOS versionOpen the App Store, go to the LINE app page, or check within the LINE app under Settings > About LINE > VersionAffected if Unable to determine version or version shows as below 11.15.0
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Compare your version to the affected rangeIf you can see the version number, verify whether it is less than 11.15.0Affected if Installed version is less than 11.15.0
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Confirm the app is actively usedCheck if the LINE iOS client is installed and used for authentication to LINE servicesAffected if The vulnerable client version is in active use and connected to LINE services
If the installed LINE iOS version is below 11.15.0, the environment may be affected by this credential exposure vulnerability.
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.
dbcve · scoped11.15.0
Update LINE iOS client to version 11.15.0 or later to remediate this vulnerability. Organizations should also review server-side configurations to ensure the described attack chain cannot be exploited.
11.15.0
- 1. Open the App Store on your iOS device
- 2. Search for LINE app
- 3. Check the current installed version of LINE
- 4. If the version is lower than 11.15.0, tap Update to install version 11.15.0 or later
- 5. Alternatively, enable automatic app updates in App Store settings to receive future security updates
- 6. After updating, verify the version in Settings > LINE > Version
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation2.0 h
- Testing1.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,744.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-41011 — 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-2021-41011 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
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- 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