CVE-2025-3898
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 · uneditedCWE-20: Improper Input Validation vulnerability exists that could cause Denial of Service when an authenticated malicious user sends HTTPS request containing invalid data type to the webserver.
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 confidenceImproper input validation vulnerability (CWE-20) in a webserver allows authenticated users to cause denial of service by sending HTTPS requests containing invalid data types. The webserver fails to properly validate or sanitize input data types before processing, leading to a condition that can crash or exhaust server resources.
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
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/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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Identify the webserver product and versionRun 'httpd -v' for Apache, 'nginx -v' for Nginx, or check your system package manager for the installed webserver package and versionAffected if The installed version matches the affected version range for this CVE (compare against vendor advisory)
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Confirm HTTPS is enabledCheck the webserver configuration file (httpd.conf, nginx.conf) for SSL/TLS directives such as 'Listen 443', 'SSLEngine on', or 'listen 443 ssl'Affected if HTTPS is enabled and the server accepts HTTPS connections on port 443
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Verify user authentication is configuredInspect the webserver config for authentication directives like 'AuthType Basic', 'Require valid-user', or authentication module configurationAffected if User authentication is required to access the webserver or specific resources
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Check if the webserver processes user-supplied data in HTTPS requestsReview application logic or webserver modules that handle query parameters, POST body data, or headers from incoming HTTPS requestsAffected if The webserver processes user-supplied data without strict type validation before use
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Review request handling for type validation gapsExamine logs or test sending requests with intentionally mismatched data types (e.g., string where integer expected) to observe server behaviorAffected if The server does not reject requests with invalid data types and exhibits abnormal behavior or crashes
You are affected if your webserver product and version is within the affected range, HTTPS is enabled, authentication is required, and the server processes user-supplied data types without proper 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 robust input validation and type checking on all user-supplied data in HTTPS request handlers. Reject requests with unexpected or invalid data types early in the processing pipeline before the data reaches vulnerable code paths.
- Consultation2.0 h
- Implementation8.0 h
- Testing4.0 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 $4,480.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-3898 — 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-2025-3898 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
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