CVE-2023-6381
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 input validation vulnerability in Newsletter Software SuperMailer affecting version 11.20.0.2204. An attacker could exploit this vulnerability by sending a malicious configuration file (file with SMB extension) to a user via a link or email attachment and persuade the user to open the file with the affected software on the local system. A successful exploit could allow the attacker to crash the application when attempting to load the malicious file.
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 confidenceSuperMailer version 11.20.0.2204 contains an improper input validation vulnerability when processing configuration files with the SMB extension. An attacker can exploit this by tricking a user into opening a specially crafted SMB file, causing the application to crash due to the failure to properly validate input data during file parsing.
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= 11.20.0.2204CVSS 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
- Local
- Complexity
- Low
- Privileges
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
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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Verify SuperMailer installation and versionOpen SuperMailer and navigate to Help > About, or check the installed program version through Windows Programs and Features, or look for SuperMailer.exe in the installation directory and view its file propertiesAffected if The installed version is exactly 11.20.0.2204
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Confirm SMB file handling capability existsCheck if SuperMailer has functionality to import or open configuration files - look for File > Open, File > Import, or similar menu options that accept .smb extension filesAffected if The application supports opening or importing SMB configuration files and this feature is accessible to the user
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Locate SMB configuration files on the systemSearch for files with .smb extension in SuperMailer's config directory (typically under the application data folder or user documents), or check recent file access locationsAffected if SMB configuration files exist and could be opened by the application
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Check for recent crash logs or error reportsReview Windows Event Viewer for Application errors related to SuperMailer, or check SuperMailer's internal log files if available, particularly around times when SMB files were processedAffected if Crash events or error logs show failures during SMB file parsing
You are affected only if SuperMailer version 11.20.0.2204 is installed AND the application has the capability to open or import SMB configuration files that a user could be tricked into opening.
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 dataUsers should avoid opening untrusted configuration files, especially those with SMB extension received via untrusted links or attachments. Monitor vendor updates for a patched version and apply it promptly once available.
- Consultation2.0 h
- Implementation2.0 h
- Testing1.0 h
- Review / QA1.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2023-6381 — 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-2023-6381 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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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