CVE-2026-57371
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 · uneditedDeserialization of Untrusted Data vulnerability in denishua WPJAM Basic wpjam-basic allows Object Injection.This issue affects WPJAM Basic: from n/a through <= 7.0.
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 confidenceThis is a PHP Object Injection vulnerability in the WPJAM Basic WordPress plugin. The plugin deserializes untrusted data without proper validation, allowing attackers to inject malicious PHP objects. This can potentially lead to remote code execution depending on available gadget chains in the WordPress environment.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS 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
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/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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Verify WPJAM Basic plugin is installedLog into WordPress admin, go to Plugins > Installed Plugins, and look for WPJAM Basic. Note the version number displayed. Alternatively, check the plugin main file (wpjam-basic.php or similar in wp-content/plugins/) for the 'Version' header comment.Affected if The plugin is installed and you cannot confirm it has been updated past the vulnerable version.
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Confirm the plugin processes serialized dataReview plugin settings and functionality. Look for any features that accept, store, or process serialized PHP data, particularly from user input, API requests, or third-party sources.Affected if The plugin deserializes data from untrusted sources without validation.
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Identify exposed endpoints or AJAX actionsCheck the plugin for registered AJAX actions (add_action('wp_ajax_...')), REST API routes, or form handlers that handle serialized payloads. Review the wp-content/plugins/wpjam-basic/ directory for PHP files containing unserialize() calls.Affected if The plugin has accessible endpoints that accept and unserialize input without sanitization.
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Check for gadget chain availabilityAudit the WordPress environment for other plugins or themes that may provide PHP object injection gadget chains. Look for known gadget classes in wp-includes/ and other plugin directories.Affected if Other installed plugins or themes contain exploitable gadget classes that could be chained with this vulnerability.
You are affected if WPJAM Basic is installed at a vulnerable version AND your environment processes untrusted serialized data through the plugin, especially via accessible AJAX or API endpoints.
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 dataUpdate WPJAM Basic to the latest patched version. If no update is available, disable the plugin or implement a Web Application Firewall to block malicious serialized payloads. Review and sanitize any user-supplied data before deserialization.
- Consultation4.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA3.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2026-57371 — 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-2026-57371 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
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