MoodleCMS
CVE-2006-4943
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 · uneditedcourse/jumpto.php in Moodle before 1.6.2 does not validate the session key (sesskey) before providing content from arbitrary local URIs, which allows remote attackers to obtain sensitive information via the jump parameter.
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 confidenceMoodle before 1.6.2 has an authentication bypass vulnerability in course/jumpto.php where the script does not validate the session key (sesskey) before processing the jump parameter. This allows remote attackers to access arbitrary local URIs and potentially obtain sensitive information without proper authentication.
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
MoodleCMS
<= 1.6.1= 1.6.0CVSS 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
- None
- Availability
- None
AV:N/AC:L/Au:N/C:P/I:N/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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Identify Moodle installation versionLocate the version.php file in your Moodle root directory (usually /version.php or /lib/version.php) and read the $release or $version variable to determine the installed version numberAffected if The installed version is 1.6.0 or 1.6.1 (versions prior to 1.6.2)
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Locate the vulnerable scriptCheck if the file course/jumpto.php exists in your Moodle installation directoryAffected if The file course/jumpto.php is present on the server
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Verify sesskey validation is missingOpen course/jumpto.php in a text editor and search for 'sesskey' or 'require_sesskey' function calls near where the 'jump' parameter is processedAffected if The file does not validate the sesskey parameter before processing the 'jump' parameter, or no sesskey check exists at all
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Confirm parameter handlingExamine the code around the 'jump' parameter handling in course/jumpto.php to see if it directly uses the parameter without authentication checksAffected if The 'jump' parameter is processed without any session key validation
You are affected if your Moodle installation is version 1.6.0 or 1.6.1 and the course/jumpto.php file lacks sesskey validation for the jump parameter.
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 Moodle 1.6.2 or later which includes sesskey validation for the jump parameter. If immediate upgrade is not possible, implement sesskey validation in course/jumpto.php before processing the jump parameter.
Fix this in Moodle
Scoped from the published advisory
- Consultation2.0 h
- Implementation2.0 h
- Testing2.0 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 $1,984.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2006-4943 — 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-2006-4943 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