CVE-2023-48256
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 · uneditedThe vulnerability allows a remote attacker to inject arbitrary HTTP response headers or manipulate HTTP response bodies inside a victim’s session via a crafted URL or HTTP request.
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 confidenceHTTP response splitting/header injection vulnerability allowing remote attackers to inject arbitrary HTTP response headers or manipulate response bodies via crafted URLs or HTTP requests by exploiting insufficient input validation on user-supplied data that flows into HTTP headers.
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>= 1000, <= 1500-sp2CVSS 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
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- Low
- Integrity
- Low
- Availability
- Low
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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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Identify installed Bosch Nexo Os versionLocate the system information or version management interface in the Bosch Nexo Os management console, or consult system documentation for version retrieval commands. Common locations include the admin dashboard, system settings, or version info endpoint.Affected if The installed version falls within >= 1000 and <= 1500-sp2
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Verify HTTP service is accessibleConfirm that the Bosch Nexo Os HTTP interface is exposed to network access. Check network configuration to determine if the web service port (typically HTTP/HTTPS) is listening and reachable.Affected if The HTTP service is enabled and accessible from network segments where untrusted users could send requests
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Test for HTTP header injection susceptibilitySend a crafted HTTP request with CRLF sequences (for example, URLs or parameters containing %0D%0A or newline characters) to the Bosch Nexo Os HTTP endpoints and observe whether the response reflects the injected headers or allows header manipulation.Affected if The application reflects user-supplied input in HTTP response headers without proper sanitization, allowing CRLF injection
A system is affected if it runs Bosch Nexo Os version 1000 through 1500-sp2, has its HTTP interface exposed, and fails to sanitize user-supplied input that flows into HTTP headers.
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 and sanitization for all user-controllable data that influences HTTP response headers, ensuring proper encoding of special characters and blocking CRLF sequences.
- Consultation2.0 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-2023-48256 — 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-2023-48256 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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- Version or environment caveats, and links to real fixes
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