CVE-2025-64639
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 · uneditedMissing Authorization vulnerability in WP Compress WP Compress for MainWP wp-compress-mainwp allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects WP Compress for MainWP: from n/a through <= 6.50.17.
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 confidenceThe WP Compress for MainWP plugin has a missing authorization vulnerability that allows attackers to exploit incorrectly configured access control security levels. This means certain actions or data can be accessed without proper authentication or permission checks, likely due to missing capability checks or nonce validation on sensitive functions.
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
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- Low
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
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 WP Compress for MainWP is installedIn WordPress admin, go to Plugins > Installed Plugins and search for 'WP Compress for MainWP' or check the /wp-content/plugins/ directory for the plugin folderAffected if The plugin is installed and active
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Identify plugin versionCheck the plugin header in its main PHP file (typically wp-content/plugins/mainwp-wp-compress-extension/index.php) for the Version comment, or view the plugin in the WordPress plugins list which displays the versionAffected if The installed version matches any vulnerable version of this plugin (no specific version range provided)
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Inspect AJAX endpoints for missing capability checksSearch plugin PHP files for add_action('wp_ajax_...) calls and verify each handler includes current_user_can() or similar capability checks before processing requestsAffected if AJAX actions lack current_user_can() or capability validation before executing sensitive operations
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Check nonce validation on sensitive functionsSearch for function calls that perform sensitive operations (settings changes, data access) and verify they include check_ajax_referer() or wp_verify_nonce() callsAffected if Sensitive functions lack nonce verification (missing check_ajax_referer or wp_verify_nonce)
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Identify unprotected admin pages or API endpointsReview plugin files for add_submenu_page, add_menu_page, or REST API registrations and verify they include capability checks via 'capability' or 'permission_callback' argumentsAffected if Admin pages or API endpoints allow access without proper capability verification
If the WP Compress for MainWP plugin is active and sensitive AJAX actions or admin functions lack capability checks and nonce validation, the environment is likely affected by this missing authorization vulnerability.
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 checks (capability checks and nonce verification) on all sensitive functions, and ensure access control security levels are correctly configured according to WordPress best practices.
- Consultation2.0 h
- Implementation4.0 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 $3,088.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-64639 — 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-2025-64639 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
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