CVE-2026-11883
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 WebAuthn Provider for Two Factor WordPress plugin before 2.5.6 does not correctly validate the second-factor authentication response, allowing an attacker who already knows a user's password to bypass the two-factor authentication requirement by submitting a malformed request.
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 WebAuthn Provider for Two Factor WordPress plugin before 2.5.6 fails to properly validate the second-factor authentication response, allowing an attacker who already possesses a user's password to bypass 2FA by submitting a malformed authentication request. This is an authentication bypass vulnerability stemming from insufficient validation logic in the WebAuthn authentication flow.
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
- High
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
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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Locate the plugin file and versionIn the WordPress admin, go to Plugins > Installed Plugins and find 'WebAuthn Provider for Two Factor' or check the plugin header file (usually in wp-content/plugins/webauthn-provider-for-two-factor/webauthn-provider-for-two-factor.php) for the 'Version' headerAffected if The plugin is installed and the version listed is below 2.5.6 (e.g., 2.5.5, 2.5.4, etc.)
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Confirm 2FA is configured for the siteCheck the WordPress user profiles or 2FA settings to see if WebAuthn/Two-Factor authentication is enabled for any user accountsAffected if WebAuthn 2FA is enabled and the plugin version is below 2.5.6, making the authentication bypass possible
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Verify WebAuthn credential registrationCheck the usermeta or database for stored webauthn_credential records, or view user profiles to confirm WebAuthn credentials have been registered as a second factorAffected if Users have registered WebAuthn credentials and the vulnerable plugin version is in use, allowing malformed requests to bypass the validation
If the WebAuthn Provider for Two Factor plugin version is below 2.5.6 and WebAuthn 2FA is enabled for any user, the environment is vulnerable to authentication bypass via malformed authentication requests.
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 · scopedUpdate the WebAuthn Provider for Two Factor plugin to version 2.5.6 or later, then verify that two-factor authentication correctly rejects malformed requests while accepting valid WebAuthn credentials.
WebAuthn Provider for Two Factor plugin version 2.5.6 or later
- Navigate to the WordPress admin dashboard
- Go to Plugins > Installed Plugins
- Find the 'WebAuthn Provider for Two Factor' plugin
- Check if the plugin is outdated (version before 2.5.6)
- If outdated, click 'Update Now' to install version 2.5.6 or later
- Verify the update was successful by checking the plugin version after updating
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation1.0 h
- Implementation1.0 h
- Testing2.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,376.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-11883 — 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-2026-11883 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