CVE-2026-3571
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 Pie Register – User Registration, Profiles & Content Restriction plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the pie_main() function in all versions up to, and including, 3.8.4.8. This makes it possible for unauthenticated attackers to change registration form status.
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 Pie Register WordPress plugin has a broken access control vulnerability where the pie_main() function lacks proper capability checks. This allows unauthenticated attackers to modify registration form settings by directly invoking this function, exploiting the absence of WordPress capability validation (e.g., current_user_can()) before executing privileged operations.
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
- Low
- Availability
- Low
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/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 Pie Register plugin is installedNavigate to WordPress admin > Plugins and confirm Pie Register appears in the installed plugins list, or inspect the /wp-content/plugins/pie-register/ directoryAffected if The plugin is installed and active
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Check installed plugin versionIn WordPress admin > Plugins, find Pie Register and note the version number displayed, or check the version header in the main plugin file (e.g., pie-register.php)Affected if Version is 3.8.4.8 or lower (the vulnerability exists up to this version)
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Inspect pie_main() function for capability checksExamine the pie_main() function in the main plugin file. Look for current_user_can(), wp_verify_nonce(), or similar permission verification calls at the function entry pointAffected if The function lacks capability checks (e.g., no current_user_can() call) and can be called without authentication verification
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Confirm unauthenticated access to pie_main()Review the plugin code to determine if pie_main() is hooked to an action that is accessible to unauthenticated users (such as init, admin_init, or wp_ajax_nopriv hooks) without prior authentication validationAffected if The function is reachable without login and performs settings modifications
Your environment is affected if Pie Register plugin is installed with version 3.8.4.8 or lower AND the pie_main() function lacks capability checks allowing unauthenticated users to modify registration settings.
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 plugin to version 3.8.4.9 or later which includes proper capability checks on the pie_main() function. Until patched, consider deploying a WAF rule to block unauthenticated requests to the affected endpoint or temporarily disable the plugin if registration functionality is not critical.
- Consultation2.0 h
- Implementation3.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-3571 — 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-2026-3571 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