dbcve.org
PrivatecontentWordPress extension · Lcweb

CVE-2023-0581

MEDIUM · 5.3 CVSS v3.1 Published 2023-01-30
Fix available
A fix is available. Upgrade to 8.4.4 or later.
See remediation →
62/100
Remediation priority · Elevated
Remotely reachable No privileges Zero-click

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 · unedited
The PrivateContent plugin for WordPress is vulnerable to protection mechanism bypass due to the use of client side validation in versions up to, and including, 8.4.3. This is due to the plugin checking if an IP had been blocklist via client-side scripts rather than server-side. This makes it possible for unauthenticated attackers to bypass any login restrictions that may prevent a brute force attack.

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 confidence

The PrivateContent WordPress plugin versions up to 8.4.3 uses client-side JavaScript to validate IP blocklists instead of server-side validation. Because client-side checks can be bypassed by modifying requests or disabling JavaScript, attackers can bypass IP-based login restrictions and conduct brute force attacks against authentication mechanisms.

MitigationUpdate PrivateContent plugin to version 8.4.4 or later, which implements server-side IP blocklist validation. Until then, consider supplemental server-level IP blocking or Web Application Firewall rules.

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
PrivatecontentWordPress extension
Affected:< 8.4.4

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
Low
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

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 checks

Work through these to decide whether this CVE applies to you.

  1. Verify PrivateContent plugin installation
    Log into WordPress admin panel, navigate to Plugins > Installed Plugins, and look for 'PrivateContent' by Lcweb in the list. Note the version number displayed next to the plugin name.
    Affected if Plugin is installed with version lower than 8.4.4
  2. Check plugin version via file header
    Access the WordPress site files via FTP or file manager. Navigate to /wp-content/plugins/private-content/ and open the main plugin PHP file (usually private-content.php). Look for the version line in the plugin header comment (e.g., 'Version: 8.4.3').
    Affected if Version returned is less than 8.4.4
  3. Confirm IP blocklist feature is active
    In WordPress admin, go to PrivateContent settings panel. Look for IP restriction, blocklist, or access control settings. Verify whether any IP addresses or IP ranges have been added to a blocklist.
    Affected if IP blocklist feature contains entries and is enabled for protecting login or authentication pages
  4. Test client-side validation behavior
    Use browser developer tools to examine network requests when accessing a protected page. Check if JavaScript files from the plugin are handling IP validation (review console for JS-based IP checks). Alternatively, attempt to access a protected page with JavaScript disabled in the browser.
    Affected if JavaScript-based IP checking is performed client-side rather than server-side, indicating the vulnerable behavior exists

You are affected if PrivateContent plugin version is below 8.4.4 AND the IP blocklist feature is configured and active in your environment.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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.

dbcve · scoped
Upgrade available Upgrade to 8.4.4 or later
Fixed in 8.4.4
Interim mitigation

Update PrivateContent plugin to version 8.4.4 or later, which implements server-side IP blocklist validation. Until then, consider supplemental server-level IP blocking or Web Application Firewall rules.

Recommended fix High confidence

Privatecontent 8.4.4

  1. Log in to the WordPress admin dashboard
  2. Navigate to Plugins > Installed Plugins
  3. Locate the Privatecontent plugin in the list
  4. Check if an update is available and click 'Update Now' to update to version 8.4.4
  5. Alternatively, go to Plugins > Add New > Upload and upload version 8.4.4 of the plugin
  6. Verify the plugin version after update by checking the Plugins list

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Privatecontent Scoped from the published advisory
  • Consultation1.0 h
  • Testing2.0 h
  • Review / QA1.0 h
4.0 hours of engineering $750
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,200.

Scan for this in your stack

Free · runs locally
dbcve dependency scanner

Check whether your project pulls in CVE-2023-0581 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.

Get it on GitHub Scan in the browser

References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2023-0581 in production — separate from our analysis above.

No notes yet

Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.

What this is

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.

What belongs here
  • 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