Unauthenticated code execution via unrestricted file upload
Published Mar 19, 2026 · Updated Mar 19, 2026
Unrestricted file upload in WooCommerce Wholesale Lead Capture 2.0.3.1 and earlier allows remote attackers to execute PHP code. The wwlc_file_upload_handler AJAX action accepts a multipart file without authentication, a nonce check, or a dangerous-type restriction and stores it in a web-accessible wwlc-temp-* uploads directory. A reachable wholesale registration form and successful discovery of the generated directory are required; uploaded PHP runs as the web process user.
Summary
What happened
Unrestricted file upload in WooCommerce Wholesale Lead Capture 2.0.3.1 and earlier allows remote attackers to execute PHP code. The wwlc_file_upload_handler AJAX action accepts a multipart file without authentication, a nonce check, or a dangerous-type restriction and stores it in a web-accessible wwlc-temp-* uploads directory. A reachable wholesale registration form and successful discovery of the generated directory are required; uploaded PHP runs as the web process user.
The record
- CVE
- CVE-2026-27540
- Published
- Mar 19, 2026
- Updated
- Mar 19, 2026
- Vendor
- Josh Kohlbach
- Product
- WooCommerce Wholesale Lead Capture
- Classifications
- CWE-434, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 19, 2026CVE publishedPublication date reported by the CVE source.
- Mar 19, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=n/a <=2.0.3.1 changes=[{"at":"2.0.3.2","status":"unaffected"}]
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Nxploited CVE-2026-27540 proof of conceptproof of concept · unverified
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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