CVE-2005-3777
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 · uneditedMyBulletinBoard (MyBB) 1.0 PR2 Rev 686 allows remote attackers to delete or move private messages (PM) via modified fields in the inbox form.
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 confidenceMyBB 1.0 PR2 Rev 686 contains an insecure direct object reference vulnerability in the private message inbox form. Remote attackers can manipulate hidden or visible form fields to delete or move private messages belonging to other users, due to insufficient authorization checks on PM manipulation actions.
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= preview_release_2_rev_686CVSS 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 MyBB versionCheck the installed MyBB version by examining the version file or admin panel. Look for version strings matching '1.0 PR2' or build number '686'. Common locations include version.php file in the root directory or the admin control panel About page.Affected if The installed version is MyBB 1.0 Preview Release 2 with build revision 686 exactly.
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Confirm private message module is activeCheck if the private message system is enabled in the forum settings. Navigate to Admin Control Panel > Forums and Posts > Private Messages or inspect the database settings table for pm_enabled or similar configuration flags.Affected if Private messaging is enabled and accessible to users.
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Check PM inbox form for authorization validationExamine the private message handling code in the MyBB source. Look for the pm.php or private.php file handling inbox actions. Inspect the delete and move operations to verify they validate that the authenticated user owns the targeted message before processing.Affected if The PM handling code lacks ownership verification checks before delete or move operations.
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Inspect PM form fields for direct object referencesView the source of the private message inbox page in a browser. Identify hidden form fields that contain message IDs, recipient IDs, or folder identifiers. Check if these fields can be modified to reference messages belonging to other users.Affected if Hidden or visible form fields expose direct object references (message IDs) that can be manipulated to target other users' messages.
You are affected if running MyBB version 1.0 PR2 Rev 686 with the private messaging module enabled, and the PM handling code lacks proper authorization checks to verify message ownership before delete or move operations.
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 dataImplement proper authorization validation to verify the authenticated user owns or has permission to modify the targeted private message before processing delete or move operations. Add CSRF protection to prevent cross-site request forgery attacks on PM management actions.
- Consultation2.0 h
- Implementation3.0 h
- Testing3.0 h
- Review / QA2.0 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-2005-3777 — 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-2005-3777 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