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CVE-2026-52699 – Unauthenticated IDOR / Sensitive Data Exposure – VikRentCar WordPress Plugin <= …

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Summary

CVE-2026-52699 is a high-severity, unauthenticated Insecure Direct Object Reference (IDOR) vulnerability in the VikRentCar Car Rental Management System WordPress plugin, affecting all versions up to and including 1.4.5. The flaw allows unauthenticated remote attackers to bypass authorization controls and directly access restricted objects — including sensitive customer rental order data belonging to other users — without any credentials or user interaction. A patch is available in version 1.4.6, released May 25, 2026.

Technical details

  • Root cause: The plugin fails to validate whether the requesting party is authorized to access the object identified by a user-controlled key, classified under CWE-639 (Authorization Bypass Through User-Controlled Key). This allows any unauthenticated caller to reference internal objects — such as booking records or rental order identifiers — and retrieve data they should not be permitted to access.
  • Trigger conditions: No authentication or user interaction is required. The vulnerability is directly accessible over the network by any unauthenticated remote attacker.
  • Attack vector: Network-based (AV:N), low complexity (AC:L); requires no privileges (PR:N) and no user interaction (UI:N).
  • Impact: High confidentiality impact (C:H) — an attacker can access restricted data belonging to other users, which in the context of a car rental management system includes customer booking records, rental order details, and personal information. There is no integrity or availability impact.

Affected software

  • VikRentCar Car Rental Management System (WordPress plugin by e4jvikwp), versions <= 1.4.5

Severity

  • CVSS v3.1 Base Score: 7.5 (High)
  • Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Mitigation and recommended actions

  • Immediate: Update the VikRentCar plugin to version 1.4.6 or later, released May 25, 2026, which contains security fixes addressing this vulnerability. The patched version is available directly from the WordPress Plugin Repository.
  • If immediate patching is not feasible: Restrict public access to sensitive plugin endpoints at the web server or WAF level, and review access logs for anomalous unauthenticated requests that enumerate booking or rental order reference parameters.

IONIX Status

The IONIX research team is tracking ongoing exploitation attempts and recommends immediate patching. Potentially affected assets are outlined in this post.

References

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