CVE-2013-2303
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 · uneditedSleipnir 4.0.0.4000 and earlier on Windows allows remote attackers to spoof the SSL lock icon and address-bar colors 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 · low confidenceSleipnir browser versions 4.0.0.4000 and earlier on Windows contain a vulnerability allowing remote attackers to spoof SSL security indicators (the lock icon and address-bar colors) via unspecified attack vectors. This enables phishing attacks that trick users into believing they are on a legitimate HTTPS site when they are not.
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<= 4.0.0.4000= 3.9.1.4000CVSS 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
- None
- Integrity
- Partial
- Availability
- None
AV:N/AC:L/Au:N/C:N/I:P/A:N
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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Verify Sleipnir browser is installedOpen Windows Control Panel > Programs and Features, or check for the Sleipnir executable (Sleipnir.exe) in typical installation directories such as C:\Program Files\Sleipnir or C:\Program Files (x86)\SleipnirAffected if Sleipnir browser is present on the Windows system
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Determine installed Sleipnir versionRight-click on Sleipnir.exe, select Properties, and check the Details tab for the Product Version. Alternatively, launch Sleipnir and navigate to Help > About to view the version numberAffected if Version cannot be determined or version displays as 4.0.0.4000 or lower, or specifically 3.9.1.4000
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Confirm Windows platformVerify the operating system is Windows (the vulnerability specifically affects Sleipnir on Windows platforms)Affected if Running on Windows with Sleipnir installed and the version falls within the affected range
You are affected if Sleipnir browser version 4.0.0.4000 or any version lower than that, including specifically 3.9.1.4000, is installed on a Windows system.
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 dataUpdate Sleipnir to a version newer than 4.0.0.4000. If no update is available, consider using an alternative browser with active security support. Users should also verify SSL certificates manually beyond relying on visual indicators.
- Consultation1.0 h
- Implementation1.0 h
- Testing1.0 h
- Review / QA1.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2013-2303 — 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-2013-2303 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
- No spam, self-promotion, credentials, or personal data