Unauthenticated account creation via unchecked waiting-list requests
Published Aug 12, 2026 · Updated Aug 12, 2026
Improper access control in ThemeWinter Eventin before 4.1.20 allows remote attackers to create WordPress accounts and inject order records. The /wp-json/eventin/v2/orders/waiting-list route accepts requests without a cookie, nonce, or authorization check and creates an etn-customer user plus a waiting order from supplied data. A published, sold-out event with its waiting list enabled is required; successful requests add unauthorized customer accounts and corrupt order data.
Summary
What happened
Improper access control in ThemeWinter Eventin before 4.1.20 allows remote attackers to create WordPress accounts and inject order records. The /wp-json/eventin/v2/orders/waiting-list route accepts requests without a cookie, nonce, or authorization check and creates an etn-customer user plus a waiting order from supplied data. A published, sold-out event with its waiting list enabled is required; successful requests add unauthorized customer accounts and corrupt order data.
The record
- CVE
- CVE-2026-13171
- Published
- Aug 12, 2026
- Updated
- Aug 12, 2026
- Vendor
- ThemeWinter
- Product
- Eventin
- Classifications
- CWE-284, T1190, T1136
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 12, 2026CVE publishedPublication date reported by the CVE source.
- Aug 12, 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=0 <4.1.20
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
- WPScan waiting-list account-creation proof of conceptfunctional · demonstrated
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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