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CVE-2026-13171 – Unauthenticated Account Creation & Order Injection – Eventin WordPress Plugin < 4.1

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Summary

CVE-2026-13171 is an improper access control vulnerability (CWE-284) in the Eventin WordPress plugin. The plugin’s waiting-list registration handler performs no authorization check, allowing unauthenticated attackers to create WordPress user accounts tied to arbitrary email addresses and inject order records into the site. The issue carries a CVSS v3.1 base score of 8.2 (High).

Technical details

  • Root cause: The waiting-list registration handler in Eventin does not verify that the requester is authorized before processing the request.
  • Trigger conditions: An attacker sends a request to the waiting-list registration endpoint on a site running a vulnerable Eventin version; no authentication or prior access is required.
  • Attack vector: Network — the endpoint is reachable remotely without user interaction or privileges.
  • Impact: Unauthenticated creation of WordPress user accounts for arbitrary email addresses and injection of fraudulent order records, affecting data integrity on the affected site.

Affected software

  • Eventin WordPress plugin: all versions prior to 4.1.20

Severity

  • CVSS v3.1 Base Score: 8.2 (High)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N

Mitigation and recommended actions

  • Immediate: Upgrade Eventin to version 4.1.20 or later, where the missing authorization check on the waiting-list registration handler is addressed.
  • If immediate patching isn’t possible: Restrict or disable public access to the plugin’s waiting-list registration functionality, and monitor for unexpected new WordPress user account creations or anomalous order records as an interim compensating control.

How IONIX identifies potentially affected assets

IONIX matches the following signals against data already collected when it crawled the asset; identifying the technology sends no request beyond that crawl.

  • Raw response body: /wp-content/plugins/wp-event-solution/

References

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How IONIX’s External Exposure Management Platform Detects and Validates
Zero-Days to Shrink MTTR

1

Map your entire attack surface (continously)

IONIX uses multi-factor discovery methods, including DNS analysis, certificate mapping, metadata inspection, and more, to automatically map every internet-facing asset across your environment. This includes cloud instances, third-party platforms, shadow IT, and even forgotten infrastructure that traditional tools miss.

2

Monitor for new CVEs

Dozens of threat intel feeds using agentic technology are continuously analyzed to detect the appearance of proof-of-concept code, exploit kits, and indicators of active targeting. IONIX goes further by applying AI to proactively evaluate whether emerging vulnerabilities are likely to be exploited, even before PoCs go public.

3

Identify Potential External Exposures

Not all CVEs matter. IONIX filters vulnerabilities by asking attacker-centric questions: Can it be reached from the internet? Does it require authentication? Is it being exploited in the wild? This dramatically reduces noise and focuses teams on threats that can actually be weaponized.

4

Create Safe, Scalable Exploit Validations

IONIX transforms real-world PoCs into safe, non-intrusive test payloads that can be run in production environments without disruption. These simulations are precisely targeted to the systems that are vulnerable, ensuring rapid validation without unnecessary load.

5

Execute Exploit Validations

By combining context about software stack, versioning, exposure status, and reachability, IONIX ensures that only the right payloads are executed against the right assets, maximizing efficiency and minimizing risk.

6

Drive Fast and Actionable Remediation

Results are routed through integrations with ticketing, SOAR, and SIEM tools. Issues are written in plain language, bundled into remediation clusters, and prioritized based on asset criticality, exploitability, and blast radius. This shortens mean time to remediation (MTTR) and empowers teams to act with confidence.

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  • Identification of potentially exposed assets to this CVE
  • Confirmation of verified exploitable assets
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