CVE-2023-39507
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 · uneditedImproper authorization in the custom URL scheme handler in "Rikunabi NEXT" App for Android prior to ver. 11.5.0 allows a malicious intent to lead the vulnerable App to access an arbitrary website.
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 · high confidenceImproper authorization in the custom URL scheme handler in the Rikunabi NEXT Android app prior to version 11.5.0 allows a malicious intent to trigger the app to access arbitrary websites, potentially leading to information disclosure or further attack vectors.
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< 11.5.0CVSS 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
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/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.
-
Check if Rikunabi NEXT app is installedOpen Android Settings > Apps > Applications and search for 'Rikunabi NEXT' or check the installed apps list for the package name (typically com.rikunabi.next or similar)Affected if The app is not found in the installed applications list, then this CVE does not apply
-
Retrieve the installed version numberIn Android Settings > Apps > Rikunabi NEXT, locate the 'Version' or 'App info' field showing the current version number (e.g., 11.4.2)Affected if The version displayed is less than 11.5.0 (for example, 11.4.x, 11.3.x, or any version below 11.5.0)
-
Confirm version against affected rangeCompare the installed version to the affected range: any version lower than 11.5.0 is vulnerable. Versions 11.5.0 and later are patched.Affected if Installed version is < 11.5.0 - the app is affected by the improper authorization flaw in the custom URL scheme handler
If Rikunabi NEXT is installed and its version is lower than 11.5.0, the environment is affected by this CVE.
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 · scoped11.5.0
Update Rikunabi NEXT Android app to version 11.5.0 or later to obtain the vendor patch for the authorization flaw in the URL scheme handler.
11.5.0
- Open the Google Play Store app on the Android device
- Search for "Rikunabi NEXT"
- Tap on the app to open its page
- If an update is available, tap "Update" to install version 11.5.0 or later
- Alternatively, enable automatic app updates in Play Store settings to ensure future security updates are applied
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Testing2.0 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 $1,408.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-39507 — 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-2023-39507 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