CVE-2011-4835
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 · uneditedDirectory traversal vulnerability in the web interface in HomeSeer HS2 2.5.0.20 allows remote attackers to access arbitrary files via unspecified vectors.
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 confidenceDirectory traversal vulnerability in HomeSeer HS2 2.5.0.20 web interface allows remote attackers to access arbitrary files on the host system by manipulating file path parameters with traversal sequences (e.g., ../). This could expose sensitive system files, configuration data, and credentials.
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= 2.5.0.20CVSS 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
- Authentication
- None
- Confidentiality
- Partial
- Integrity
- Partial
- Availability
- Partial
AV:N/AC:L/Au:N/C:P/I:P/A:P
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 if HomeSeer HS2 is installedCheck for HomeSeer HS2 installation by looking for the application in Program Files, or check Windows Services for 'HomeSeer' service, or look for port 80/8080 listeners if web interface is enabledAffected if HomeSeer HS2 software is present on the system
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Determine the installed versionOpen the HomeSeer application or check the About/Help section within the HomeSeer interface to display the exact version numberAffected if The installed version is exactly 2.5.0.20
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Verify the web interface is enabledCheck if the HomeSeer web server is running by accessing the web interface on the default port (typically 80 or 8080) or by checking the HomeSeer configuration for web server statusAffected if The HomeSeer web interface is enabled and accessible
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Confirm version matches affected releaseCompare your identified version against the affected version 2.5.0.20 as listed in the CVEAffected if The installed version is precisely 2.5.0.20 and the web interface is exposed
You are affected only if HomeSeer HS2 version 2.5.0.20 is installed and its web interface is enabled and accessible on your network.
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 dataApply vendor patch if available; otherwise, restrict network access to the HomeSeer web interface, implement strict input validation to reject path traversal sequences, and use canonical path resolution with directory containment checks before file access.
- Consultation6.0 h
- Implementation12.0 h
- Testing6.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $7,968.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2011-4835 — 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-2011-4835 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