CVE-2024-4133
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 ARMember – Membership Plugin, Content Restriction, Member Levels, User Profile & User signup plugin for WordPress is vulnerable to Open Redirect in all versions up to, and including, 4.0.30. This is due to insufficient validation on the redirect url supplied via the redirect_to parameter. This makes it possible for unauthenticated attackers to redirect users to potentially malicious sites if they can successfully trick them into performing an action.
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 ARMember WordPress plugin before version 4.0.31 contains an open redirect vulnerability in its authentication flow. The plugin fails to properly validate the redirect_to parameter, allowing attackers to craft malicious URLs that redirect authenticated or authenticating users to attacker-controlled websites. Unauthenticated attackers can exploit this by tricking users into clicking specially crafted links.
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
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/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 checksWork through these to decide whether this CVE applies to you.
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Verify ARMember plugin is installedCheck your WordPress site's plugin directory or access the Plugins page in the WordPress admin dashboard to confirm ARMember is present and activeAffected if ARMember plugin is installed and active on the WordPress site
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Check installed ARMember versionNavigate to Plugins > Installed Plugins > ARMember and view the version number displayed, or inspect the plugin's main PHP file header for the Version fieldAffected if The installed version is earlier than 4.0.31 (e.g., 4.0.30, 4.0.20, etc.)
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Confirm authentication flow is enabledCheck if WordPress user registration, ARMember membership, or login functionality is active on the site. Inspect ARMember settings for any enabled login, registration, or membership pagesAffected if Any ARMember authentication, login, or registration features are enabled and accessible to users
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Inspect redirect usage in authentication URLsExamine login, registration, or membership URLs on your site for the redirect_to parameter. Test a URL such as your-login-page?redirect_to=http://example.com to verify if the parameter is accepted and usedAffected if The redirect_to parameter is accepted and users are redirected to external URLs based on the parameter value
Your environment is affected if ARMember plugin versions before 4.0.31 are installed with authentication features enabled, and the redirect_to parameter in authentication URLs is not validated before use.
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 ARMember plugin to version 4.0.31 or later to obtain the vendor patch. If immediate update is not possible, implement a Web Application Firewall (WAF) rule to validate and whitelist redirect destinations, and educate users about not clicking untrusted links with redirect parameters.
- Consultation1.0 h
- Implementation0.5 h
- Testing0.5 h
- Review / QA0.5 h
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 locallyCheck whether your project pulls in CVE-2024-4133 — 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-2024-4133 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
- No spam, self-promotion, credentials, or personal data