JoomlaCMS
CVE-2007-6645
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 Joomla! before 1.5 RC4 allows remote authenticated users to gain privileges via unspecified vectors, aka "registered user privilege escalation vulnerability."
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 confidenceJoomla! before version 1.5 RC4 contains a privilege escalation vulnerability allowing authenticated 'registered' users to elevate their privileges to administrative levels through unspecified vectors. The vulnerability is remotely exploitable over the network and requires only a valid user account to trigger.
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
JoomlaCMS
= 1.5rc4CVSS 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 installed Joomla versionAccess the Joomla administrator backend and navigate to Help > System Info > System Information, or check the /libraries/joomla/version.php file for the version numberAffected if The installed version is earlier than 1.5 RC4 (versions 1.5 Beta, 1.5 Alpha, or pre-1.5 versions)
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Verify if user registration is enabledIn the Joomla admin panel, go to Site > Global Configuration > System tab and check the 'New User Account Activation' setting. If set to 'None' or 'Self', user self-registration is enabledAffected if User registration is set to allow self-registration (None or Self activation), which enables an attacker to create a registered-level account
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Review user accounts for unauthorized admin privilegesIn the admin panel, navigate to Site > User Manager and examine all users with Administrator or Super Administrator group assignments. Cross-reference creation dates and last login times for anomaliesAffected if There are administrative-level users that were created without your knowledge or authorization, especially around the time the vulnerability could have been exploited
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Check for unexpected privilege escalationReview the #__users table in the database, specifically the gid (group ID) field. Look for users whose group ID changed from 18 (Registered) to 25 (Administrator) or 24 (Super Administrator)Affected if Users with 'Registered' level access have elevated group IDs corresponding to administrative roles
You are affected if your Joomla installation version is before 1.5 RC4 and user registration is enabled, allowing any valid user to potentially escalate to administrative privileges.
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 Joomla! to version 1.5 RC4 or later. If upgrade is not feasible, implement strict access controls and monitor administrative user creation for suspicious activity.
Fix this in Joomla
Scoped from the published advisory
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 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 $2,800.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2007-6645 — 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-2007-6645 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