CVE-2025-34508
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 · uneditedA path traversal vulnerability exists in the file dropoff functionality of ZendTo versions 6.15-7 and prior. This could allow a remote, authenticated attacker to retrieve the files of other ZendTo users, retrieve files on the host system, or cause a denial of service.
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 path traversal vulnerability in ZendTo's file dropoff functionality allows authenticated remote attackers to manipulate file paths using directory traversal sequences (e.g., ../../../') to access files outside the intended storage directory, enabling unauthorized access to other users' files and potentially sensitive system files.
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
- Low
- Integrity
- Low
- Availability
- Low
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
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 ZendTo installation and versionLocate the ZendTo installation directory and check the version file (e.g., VERSION, changelog, or admin panel about page). Compare the installed version to the fixed version 7.01-01.Affected if Installed version is lower than 7.01-01 and the file dropoff feature is in use.
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Verify file dropoff functionality is enabledCheck the ZendTo configuration file (typically config.php or settings) for the dropoff feature status. Look for settings like 'enabled', 'dropoff_enabled', or similar toggles.Affected if Dropoff functionality is enabled on a version prior to 7.01-01.
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Inspect storage directory configurationReview the ZendTo configuration for the storage base path (e.g., 'storagePath', 'dropboxPath', or 'UPLOAD_DIR' setting). Verify it points to an appropriately restricted directory.Affected if The storage path is not properly isolated or uses a world-writable directory.
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Review authentication settings for dropoffExamine the authentication configuration to determine what user roles can access the file dropoff feature. Check if guest or untrusted users have dropoff permissions.Affected if Authenticated users with limited privileges can access dropoff functionality on a vulnerable version.
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Check logs for path traversal attemptsSearch ZendTo access and error logs for patterns containing '../', '..\', or multiple slash sequences in file path parameters. Look for unusual file access patterns.Affected if Log entries show directory traversal sequences in dropoff requests.
A user is affected if ZendTo version is below 7.01-01, file dropoff is enabled, and the storage directory is accessible to authenticated users without proper path sanitization.
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 dataUpgrade to ZendTo version 7.01-01 or later which contains the patch for this vulnerability, or apply the vendor-provided security update to address the path traversal in the file dropoff component.
- Consultation3.0 h
- Implementation6.0 h
- Testing4.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-34508 — 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-2025-34508 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
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