Stage File ProxyDrupal extension · Stage File Proxy Project
CVE-2025-3734
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 · uneditedAllocation of Resources Without Limits or Throttling vulnerability in Drupal Stage File Proxy allows Flooding.This issue affects Stage File Proxy: from 0.0.0 before 3.1.5.
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 resource exhaustion vulnerability in Drupal Stage File Proxy (versions before 3.1.5) allows attackers to flood the system due to insufficient allocation limits or throttling on file proxy requests. This can lead to denial of service by overwhelming server resources through excessive proxy requests.
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
Stage File ProxyDrupal extension
< 3.1.5CVSS 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
- High
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
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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Check Stage File Proxy module versionLocate the stage_file_proxy.info.yml file in the Drupal modules directory, or access Drupal admin at /admin/modules or /admin/reports/status to view the installed version numberAffected if The installed version is earlier than 3.1.5
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Verify Stage File Proxy is enabledQuery the Drupal system table where status=1 for stage_file_proxy module, or check the module list in Drupal admin at /admin/modulesAffected if The Stage File Proxy module is enabled and loaded
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Confirm proxy functionality is configuredReview Drupal configuration for stage_file_proxy settings (config/export or settings.php), or check the module configuration page at /admin/config/stage_file_proxyAffected if The module has an origin URL configured or is set to fetch files from a remote environment
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Check for unusual proxy request volumeReview web server access logs or Drupal logs for patterns of excessive requests to the stage_file_proxy endpoint, look for repeated file fetch requests in a short timeframeAffected if Logs show abnormally high volume of proxy requests that could indicate exploitation attempts
The environment is affected if Stage File Proxy version is below 3.1.5 AND the module is enabled with proxy configuration active, exposing the system to resource exhaustion from unthrottled file proxy requests.
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 · scoped3.1.5
Upgrade Stage File Proxy to version 3.1.5 or later. Implement request rate limiting on the stage file proxy endpoint to prevent flooding attacks.
3.1.5
- Check the current version of Stage File Proxy module installed on your Drupal site
- Create a complete backup of your Drupal site database and files
- Update the Stage File Proxy module to version 3.1.5 using your site's package manager (composer require drupal/stage_file_proxy:^3.1.5 or equivalent)
- Clear Drupal caches after the update (drush cr or through admin UI)
- Verify the update was successful by checking the module version
Generated from the published advisory — verify against the referenced sources before acting.
Fix this in Stage File Proxy
Scoped from the published advisory
- Consultation1.0 h
- Implementation2.0 h
- Testing2.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,664.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-3734 — 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-2025-3734 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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