CVE-2023-40513
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 · uneditedLG Simple Editor UserManageController getImageByFilename Directory Traversal Information Disclosure Vulnerability. This vulnerability allows remote attackers to disclose sensitive information on affected installations of LG Simple Editor. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the getImageByFilename method in the UserManageController class. The issue results from the lack of proper validation of a user-supplied path prior to using it in file operations. An attacker can leverage this vulnerability to disclose information in the context of SYSTEM. . Was ZDI-CAN-20015.
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 confidenceA directory traversal vulnerability exists in the getImageByFilename method of UserManageController in LG Simple Editor. The application fails to validate user-supplied paths before performing file operations, allowing authenticated attackers (with a bypassable authentication mechanism) to access arbitrary files on the system and disclose sensitive information in SYSTEM context.
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= 3.21.0CVSS 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
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:L/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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Identify LG Simple Editor installationSearch for LG Simple Editor in your system by checking installed applications, web server directories, or service listings. Look for the application in common web server paths (e.g., /var/www, /opt, C:\inetpub, or application deployment directories).Affected if LG Simple Editor software is found on the system
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Verify installed versionLocate the application files and check version information in configuration files, manifest files (e.g., version.json, manifest.xml), or the application's about/help page. Compare the discovered version against the affected range.Affected if Version is exactly 3.21.0
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Confirm UserManageController is presentExamine the application's web directory for the UserManageController class or file. This is typically found in the source code or decompiled application binaries. Look for getImageByFilename method.Affected if UserManageController with getImageByFilename method exists in the installation
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Check network accessibility of the serviceDetermine if the LG Simple Editor web interface is exposed to the network by testing HTTP/HTTPS access from external systems or reviewing firewall rules and network configuration.Affected if The web application is network-accessible without proper network segmentation
Your environment is affected if LG Simple Editor version 3.21.0 is installed with the UserManageController component and the web service is network-accessible, allowing potential path traversal attacks against the getImageByFilename endpoint.
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 dataApply vendor patches when available. Until then, restrict network access to the affected service, implement web application firewall rules to detect and block path traversal patterns (../), and ensure the authentication bypass is addressed.
- Consultation4.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2023-40513 — 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-2023-40513 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
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