CVE-2023-4550
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, Files or Directories Accessible to External Parties vulnerability in OpenText AppBuilder on Windows, Linux allows Probe System Files. An unauthenticated or authenticated user can abuse a page of AppBuilder to read arbitrary files on the server on which it is hosted. This issue affects AppBuilder: from 21.2 before 23.2.
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 confidenceOpenText AppBuilder contains an improper input validation vulnerability that allows unauthenticated or authenticated users to read arbitrary files on the server filesystem. The vulnerability stems from insufficient validation of user-supplied input in a specific page, likely due to path traversal (e.g., ../ sequences) being allowed in file access operations.
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>= 21.2, < 23.2CVSS 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
- 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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Identify AppBuilder versionCheck the installed version of OpenText AppBuilder by reviewing the application metadata, typically found in the product's about page, versioninfo file, or by querying the application's built-in version endpoint. Compare the version number to the affected range: >= 21.2 and < 23.2.Affected if The installed version falls within 21.2 to 23.1 (inclusive)
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Locate the vulnerable endpointIdentify if the specific page or endpoint that handles file access requests is present and accessible in the deployment. This typically involves reviewing the application's URL structure and identifying pages that accept file path parameters.Affected if The vulnerable file access endpoint exists and is reachable without authentication or with standard user credentials
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Test for path traversal protectionAttempt a controlled test by sending a request with path traversal sequences (e.g., ../../) to the identified endpoint, observing whether the application blocks or allows navigation outside the intended directory.Affected if The application allows path traversal sequences and returns file contents from directories outside the intended scope
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Review application file access permissionsInspect the application's configuration or runtime environment to determine what filesystem permissions the AppBuilder process runs with and which directories it can access.Affected if The application runs with permissions that allow reading sensitive system files outside the webroot
A user is affected if their AppBuilder installation is version 21.2 through 23.1 and the vulnerable file access endpoint permits path traversal to read arbitrary files.
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 · scoped23.2
Upgrade AppBuilder to version 23.2 or later to receive the vendor patch. If immediate upgrade is not feasible, implement web application firewall (WAF) rules to block path traversal patterns and restrict the application's file access permissions.
23.2 or later
- 1. Back up your current AppBuilder installation and database before proceeding with any upgrade.
- 2. Review OpenText AppBuilder 23.2 release notes and upgrade documentation for any prerequisites.
- 3. Download AppBuilder version 23.2 or later from the OpenText support portal (support.opentext.com).
- 4. Execute the upgrade installer following the standard AppBuilder upgrade procedure.
- 5. After upgrade, verify that the arbitrary file read vulnerability is resolved by testing that directory traversal attempts are properly blocked.
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 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 $5,600.
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Free · runs locallyCheck whether your project pulls in CVE-2023-4550 — 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-2023-4550 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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