CVE-2026-4986
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 WPForms WordPress plugin before 1.10.0.5 does not verify the authenticity of incoming PayPal webhook events before processing them, allowing unauthenticated attackers to forge webhook payloads and manipulate the payment state of arbitrary transactions.
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 WPForms WordPress plugin before version 1.10.0.5 does not validate the authenticity of PayPal webhook events before processing them. This allows unauthenticated attackers to send forged webhook payloads and manipulate the payment state (e.g., mark unpaid orders as paid) for any transaction.
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
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/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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Identify WPForms plugin installationCheck for the presence of the WPForms plugin in the WordPress installation at /wp-content/plugins/wpforms/ or via the WordPress admin dashboard under Plugins.Affected if WPForms plugin is not installed or cannot be found, then the vulnerability does not apply.
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Determine installed WPForms versionOpen the main WPForms plugin file (wpforms.php) and locate the Version header in the plugin file comment block, or check the WordPress admin Plugins page for the installed version number.Affected if The version number is lower than 1.10.0.5 (for example, 1.10.0.4, 1.9.x, or earlier).
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Verify PayPal integration is activeNavigate to WPForms > Settings > Payments in the WordPress admin and check if PayPal is enabled, or inspect the wpforms_paypal table in the database for active payment forms.Affected if PayPal payments are enabled and configured in WPForms, making the webhook signature validation flaw exploitable.
A user is affected if WPForms version is below 1.10.0.5 AND PayPal payment processing is enabled in the plugin 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.
dbcve · scopedUpgrade WPForms to version 1.10.0.5 or later which implements proper PayPal webhook signature verification to ensure webhook payloads originate from PayPal.
WPForms version 1.10.0.5 or later
- 1. Log in to the WordPress admin dashboard
- 2. Navigate to Plugins > Installed Plugins
- 3. Locate WPForms plugin in the list
- 4. If an update is available, click 'Update Now' to upgrade to version 1.10.0.5 or later
- 5. Alternatively, download WPForms version 1.10.0.5 or later from the WordPress plugin repository
- 6. Deactivate the current WPForms plugin, delete it, then upload and activate the new version
- 7. Verify the upgrade was successful by checking the plugin version
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation1.0 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 $2,224.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-4986 — 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-2026-4986 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