CVE-2021-44534
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 · uneditedInsufficient user input filtering leads to arbitrary file read by non-authenticated attacker, which results in sensitive information disclosure.
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 confidenceThis is a path traversal vulnerability where insufficient input filtering on user-supplied data allows unauthenticated attackers to read arbitrary files on the server, potentially exposing sensitive configuration files, credentials, or other confidential data.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS 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 file-handling componentsReview your application's codebase or configuration for endpoints, functions, or APIs that accept user-supplied file paths or filenames. Look for parameters that reference files, such as 'file', 'path', 'filename', 'include', or similar. Search for usage of file reading functions that take user input.Affected if The application processes user-supplied paths to read or include files from the server filesystem.
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Verify authentication on file access endpointsInspect your access control configuration and test file-related endpoints without providing credentials. Check if unauthenticated requests to file access functionality are accepted or rejected.Affected if File access endpoints are accessible without authentication.
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Test for path traversal injectionSend requests to file-handling endpoints containing path traversal sequences such as '../' or '..\' in parameters. Compare your application's behavior to expected normal operation. Review server access logs for attempts containing these sequences.Affected if The application returns files outside the intended directory when traversal sequences are supplied.
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Check input filtering implementationExamine the code or configuration handling file path parameters. Look for explicit validation, allowlisting, or sanitization of '../' sequences before file operations occur.Affected if No input validation or path traversal filtering is implemented on file path parameters.
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Review file access permissionsVerify that the application process runs with minimal filesystem permissions. Check which directories and files the service account can access. Ensure sensitive files are not readable by the application process.Affected if The application runs with elevated privileges and can access sensitive system or configuration files.
Your environment is affected if unauthenticated users can supply file path parameters to your application and retrieve files outside the intended directory due to missing input validation.
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 dataImplement strict input validation using allowlists, sanitize path traversal sequences (../), and use secure file access APIs that prevent directory traversal. Additionally, enforce proper authentication and authorization checks on all file access endpoints.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA3.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,888.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-44534 — 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-2021-44534 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