CVE-2018-1000059
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 · uneditedValidFormBuilder version 4.5.4 contains a PHP Object Injection vulnerability in Valid Form unserialize method that can result in Possible to execute unauthorised system commands remotely and disclose file contents in file system.
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 confidenceValidFormBuilder version 4.5.4 contains a PHP Object Injection vulnerability in its unserialize method. By supplying crafted serialized PHP objects, remote attackers can trigger magic methods (such as __wakeup or __destruct) to achieve remote code execution or read arbitrary files from the filesystem.
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= 4.5.4CVSS 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
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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 ValidFormBuilder installation and versionLocate the ValidFormBuilder installation directory and check for version indicators such as a version.php file, changelog, or composer.json. Common locations include /vendor/validformbuilder or similar library directories.Affected if The installed version is exactly 4.5.4
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Locate the vulnerable unserialize callSearch the codebase for the unserialize() function call within the ValidFormBuilder files. Look in core library files, particularly those handling form data processing or session handling.Affected if An unserialize() call exists in the ValidFormBuilder code at version 4.5.4
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Verify if unserialize receives user inputExamine the unserialize call found to determine if its input originates from external sources such as GET/POST parameters, cookies, session data, or database values that could be controlled by an attacker.Affected if The unserialize() function processes data that can be influenced by user input without sanitization or whitelisting
A user is affected if ValidFormBuilder version 4.5.4 is installed and contains the vulnerable unserialize call that processes unsanitized user-controlled input.
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 dataReplace all unserialize() calls with safer alternatives like json_decode() or implement whitelisting if serialization is required. If upgrading is possible, obtain and apply any available patches from the vendor.
- Consultation4.0 h
- Implementation6.0 h
- Testing4.0 h
- Review / QA3.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-1000059 — 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-2018-1000059 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