CVE-2026-1560
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 · uneditedThe Custom Block Builder – Lazy Blocks plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 4.2.0 via multiple functions in the 'LazyBlocks_Blocks' class. This makes it possible for authenticated attackers, with Contributor-level access and above, to execute code on the server.
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 confidenceThe Lazy Blocks WordPress plugin (versions up to 4.2.0) contains a Remote Code Execution vulnerability in multiple functions within the LazyBlocks_Blocks class. Authenticated users with Contributor-level access or higher can execute arbitrary code on the server by exploiting insecure function handling in this class.
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 Lazy Blocks plugin is installedIn WordPress admin, go to Plugins > Installed Plugins and look for 'Lazy Blocks' in the list, or check the file /wp-content/plugins/lazy-blocks/plugin.php existsAffected if The Lazy Blocks plugin is not installed or not present on the system
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Check the installed version of Lazy BlocksIn WordPress admin > Plugins > Installed Plugins, find Lazy Blocks and note the version number displayed below the plugin name; alternatively, read the 'Version:' line in /wp-content/plugins/lazy-blocks/plugin.phpAffected if The version is 4.2.0 or lower
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Confirm the plugin is activeIn WordPress admin > Plugins > Installed Plugins, check if Lazy Blocks shows 'Active' status under the plugin name, or query the wp_options table for option_name='active_plugins' containing 'lazy-blocks'Affected if Lazy Blocks is installed but not currently active (the vulnerability cannot be exploited while the plugin is deactivated)
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Identify users with Contributor-level access or higherIn WordPress admin > Users, review the Role column for any accounts assigned Contributor, Author, Editor, or Administrator roles; these roles all have Contributor-level or higher privilegesAffected if At least one user account has Contributor, Author, Editor, or Administrator role, providing authenticated access needed to exploit the vulnerability
You are affected if Lazy Blocks plugin is installed, active, at version 4.2.0 or lower, AND at least one user with Contributor-level or higher access exists on the site.
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 the Lazy Blocks plugin to a version beyond 4.2.0 when available. Until then, restrict contributor-level permissions and audit user accounts with contributor access.
- Consultation3.0 h
- Implementation6.0 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 $3,984.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-1560 — 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-2026-1560 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