CVE-2021-47921
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 · uneditedFree Photo & Video Vault 0.0.2 contains a directory traversal web vulnerability that allows remote attackers to manipulate application path requests and access sensitive system files. Attackers can exploit the vulnerability without privileges to retrieve environment variables and access unauthorized system paths.
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 confidenceFree Photo & Video Vault 0.0.2 fails to properly validate path inputs in web requests, allowing authenticated or unauthenticated attackers to use directory traversal sequences (e.g., ../) to escape the intended application directory and access arbitrary files on the host system. This can expose sensitive system files, configuration files, and environment variables containing credentials or other secrets.
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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Confirm Free Photo & Video Vault is installedLocate the application installation directory or check installed programs list for 'Free Photo & Video Vault'. On Windows, check Program Files or the installation path used during setup.Affected if The application is installed on the system
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Verify the installed versionCheck the application's version information - typically found in the application properties, about page, or version file in the installation directory. Compare against version 0.0.2.Affected if The installed version is 0.0.2
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Confirm the web server component is enabledCheck if the application's web interface or API service is running and accessible. This vulnerability exploits web request handling, so the web component must be active.Affected if The web server or API component is running and accessible on a network port or localhost
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Test for directory traversal vulnerabilitySend an HTTP request to the application endpoint with a path containing traversal sequences (e.g., ../../../../etc/passwd or ../../../../windows/win.ini) and observe if the application returns file contents outside the intended vault directory.Affected if The application returns content from files outside its designated directory when traversal sequences are used in the request
The environment is affected if Free Photo & Video Vault version 0.0.2 is installed with its web component enabled, and the application allows directory 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.
From vendor dataImplement strict input validation using realpath() to resolve and verify that requested paths remain within the application's intended directory. Apply whitelist-based file access controls and reject any path containing traversal sequences.
- Consultation1.0 h
- Implementation4.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-47921 — 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-2021-47921 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