CVE-2026-57315
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 · uneditedContributor Remote Code Execution (RCE) in Blocksy Companion Pro <= 2.1.45 versions.
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 confidenceRemote Code Execution vulnerability in Blocksy Companion Pro WordPress plugin allowing users with Contributor-level permissions to execute arbitrary code on the server. The vulnerability affects versions 2.1.45 and below, likely through improper capability checks or input validation in AJAX endpoints.
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
- High
- Privileges
- Low
- User interaction
- None
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/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 Blocksy Companion Pro is installedCheck for the plugin directory at wp-content/plugins/blocksy-companion-pro/ or search for 'Blocksy Companion Pro' in the WordPress plugins admin areaAffected if The plugin directory exists or the plugin appears in WordPress admin plugins list
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Determine the installed versionOpen the main plugin file (typically blocksy-companion-pro.php) and locate the 'Version' header in the plugin comments, or check the version listed in WordPress admin under Plugins > Installed PluginsAffected if The version number is 2.1.45 or lower
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Identify Contributor-level user accountsQuery the WordPress database: SELECT user_id, meta_value FROM wp_usermeta WHERE meta_key = 'wp_capabilities' AND meta_value LIKE '%contributor%'; or use a user management plugin to list all users with Contributor roleAffected if Any user accounts with Contributor role exist in the system
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Inspect AJAX endpoint accessibilityCheck if the blocksy-companion-pro AJAX handlers are accessible by reviewing the plugin's AJAX registration code (usually in main PHP file or separate ajax.php), looking for admin-ajax.php hooks with 'wp_ajax_blocksy_' or 'wp_ajax_nopriv_blocksy_' prefixesAffected if AJAX endpoints are registered and callable without proper capability verification for Contributor users
If Blocksy Companion Pro is installed at version 2.1.45 or below and any Contributor-level users exist with access to the site's AJAX functionality, the environment is likely affected by CVE-2026-57315.
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 Blocksy Companion Pro to a version newer than 2.1.45. Additionally, audit user accounts with Contributor role for suspicious activity and consider implementing temporary capability restrictions until the patch is applied.
- Consultation2.0 h
- Implementation1.0 h
- Testing2.0 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 $1,696.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-57315 — 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-2026-57315 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