FirefoxWeb browser · Mozilla
CVE-2011-0076
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 · uneditedUnspecified vulnerability in the Java Embedding Plugin (JEP) in Mozilla Firefox before 3.5.19 and 3.6.x before 3.6.17, and SeaMonkey before 2.0.14, on Mac OS X allows remote attackers to bypass intended access restrictions via unknown 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 · high confidenceThe Java Embedding Plugin (JEP) in older Mozilla Firefox (before 3.5.19 and 3.6.x before 3.6.17) and SeaMonkey (before 2.0.14) on Mac OS X contained an unspecified vulnerability allowing remote attackers to bypass intended access restrictions, likely enabling cross-origin or sandbox escapes.
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
FirefoxWeb browser
= 3.6= 3.6.2= 3.6.3= 3.6.4= 3.6.6= 3.6.7= 3.6.8= 3.6.9= 3.6.10= 3.6.11= 3.6.12= 3.6.13<= 2.0.13= 1.0= 1.0.1= 1.0.2= 1.0.3= 1.0.4= 1.0.5= 1.0.6= 1.0.7= 1.0.8= 1.0.9= 1.1CVSS 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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Confirm operating systemVerify the system is running Mac OS X. This vulnerability only affects the Java Embedding Plugin on Mac OS X, not Windows or Linux.Affected if System is NOT running Mac OS X - the vulnerability does not apply
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Identify Firefox versionOpen Firefox, click Firefox menu > About Firefox. Record the version number. Alternatively, run 'firefox --version' in terminal.Affected if Version is Firefox 3.6.x (3.6, 3.6.2-3.6.13) or any version below 3.5.19 or 3.6.17
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Identify SeaMonkey versionOpen SeaMonkey, click SeaMonkey menu > About SeaMonkey. Record the version number. Alternatively, run 'seamonkey --version' in terminal.Affected if Version is SeaMonkey 2.0.x (2.0.13 or below) or SeaMonkey 1.0.x through 1.1
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Check for Java Embedding PluginNavigate to ~/Library/Internet Plug-Ins/ or /Library/Internet Plug-Ins/ and look for files named 'JavaEmbeddingPlugin.plugin' or similar JEP components.Affected if The Java Embedding Plugin is present in the browser's plug-in directory
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Check Java plugin statusIn Firefox or SeaMonkey, go to Edit > Preferences > Applications (or Add-ons > Plugins). Look for 'Java Applet Plug-in' or 'Java Platform SE' entries.Affected if Java plugin is enabled in the browser
User is affected if running Mac OS X with Firefox versions below 3.5.19 or 3.6.17 (specifically 3.6.x series), or SeaMonkey 2.0.13/earlier or 1.x, AND the Java Embedding Plugin is present and Java is enabled in the browser.
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 dataUpgrade to Firefox 3.5.19+, 3.6.17+, or migrate to a modern Firefox version; similarly upgrade SeaMonkey to 2.0.14+ or use a current browser. The Java Embedding Plugin should be disabled or removed if not needed.
Fix this in Firefox
Scoped from the published advisory
- Consultation1.0 h
- Implementation1.0 h
- Testing1.0 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 $1,200.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2011-0076 — 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-2011-0076 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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