CVE-2025-49399
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 · uneditedCross-Site Request Forgery (CSRF) vulnerability in Basix NEX-Forms nex-forms-express-wp-form-builder allows Cross Site Request Forgery.This issue affects NEX-Forms: from n/a through <= 9.1.3.
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 · moderate confidenceCross-Site Request Forgery (CSRF) vulnerability in the NEX-Forms WordPress plugin (versions through 9.1.3). The plugin lacks proper anti-CSRF token validation on form submissions and AJAX actions, allowing attackers to trick authenticated administrators into performing unintended state-changing operations such as form configuration changes or data submissions.
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
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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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Verify NEX-Forms plugin installationCheck if the NEX-Forms plugin is active on the WordPress site by reviewing the plugins list in wp-admin or by inspecting the wp-content/plugins/nex-forms directoryAffected if The NEX-Forms plugin is installed and active
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Determine installed plugin versionLocate the main plugin file (typically nex-forms.php) and read the Version header from the plugin file comment block, or use: grep -i 'Version:' wp-content/plugins/nex-forms/*.phpAffected if Version is 9.1.3 or lower (the vulnerability affects versions through 9.1.3)
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Inspect form submission handlers for nonce validationExamine the main plugin PHP file for form handling functions and check whether wp_verify_nonce, check_admin_referer, or wp_create_nonce are called before processing form dataAffected if Form submission handlers exist but do not validate nonces (wp_verify_nonce or check_admin_referer calls are absent)
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Inspect AJAX action handlers for nonce validationSearch for add_action calls registering AJAX endpoints (wp_ajax_* or wp_ajax_nopriv_*) and verify whether nonces are checked in the corresponding handler functionsAffected if AJAX actions are registered but the handlers lack nonce verification before processing requests
A user is affected if the NEX-Forms plugin version is 9.1.3 or lower and the plugin processes form submissions or AJAX actions without validating WordPress nonces.
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 dataImplement WordPress nonces (anti-CSRF tokens) on all form submissions and AJAX actions within the plugin, and validate Origin/Referer headers on POST requests to ensure requests originate from legitimate sources.
- Consultation3.0 h
- Implementation6.0 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 $3,984.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-49399 — 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-2025-49399 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