CVE-2026-52699: VikRentCar IDOR Auth Bypass Vulnerability

CVE-2026-52699 Overview

CVE-2026-52699 is an unauthenticated Insecure Direct Object Reference (IDOR) vulnerability affecting the VikRentCar WordPress plugin versions 1.4.5 and earlier. The flaw allows remote attackers to access objects belonging to other users without authentication. Exploitation requires no privileges and no user interaction over the network. The weakness is classified under [CWE-639] Authorization Bypass Through User-Controlled Key. Patchstack published the advisory referencing the VikRentCar plugin ecosystem on WordPress.

Critical Impact
Unauthenticated attackers can read sensitive booking and customer data by manipulating object identifiers in plugin requests, leading to confidentiality loss across rental car reservation records.

Affected Products

VikRentCar WordPress plugin versions 1.4.5 and earlier
WordPress installations exposing the VikRentCar plugin endpoints to the internet
Sites running the VikRentCar booking module without an updated patch

Discovery Timeline

2026-06-15 - CVE-2026-52699 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2026-52699

Vulnerability Analysis

The vulnerability stems from missing authorization checks on object identifiers passed in plugin requests. VikRentCar exposes resource references — such as booking IDs, customer records, or reservation tokens — that the application accepts without verifying ownership or session context. An attacker iterates or guesses these identifiers and retrieves records belonging to other users. The flaw maps to [CWE-639], which describes authorization bypass through user-controlled keys. Because the issue is reachable without authentication, any unauthenticated visitor can interact with the affected endpoints. The result is confidentiality impact only, with no integrity or availability degradation indicated in the advisory. The EPSS probability sits at roughly 0.237 percent, reflecting low observed exploitation interest at publication time.

Root Cause

The plugin trusts user-supplied identifiers without enforcing access control. The code paths that fetch booking objects do not verify that the requester owns or is permitted to view the requested resource. This pattern allows direct reference manipulation.

Attack Vector

An attacker sends crafted HTTP requests to the WordPress site running VikRentCar. By substituting numeric or token-based resource identifiers, the attacker enumerates records and harvests sensitive reservation data. No credentials, cookies, or user interaction are required. Refer to the Patchstack Vulnerability Report for endpoint-level details.

No verified public exploit code is available. The vulnerability is described in prose because no validated proof-of-concept has been released.

Detection Methods for CVE-2026-52699

Indicators of Compromise

Sequential or enumerated values in query parameters or POST bodies targeting VikRentCar endpoints from a single source address
Unauthenticated HTTP requests returning booking or customer data in response bodies
Spikes in 200-status responses against plugin URLs from non-browser user agents

Detection Strategies

Inspect WordPress access logs for unauthenticated requests to VikRentCar handlers that include identifier parameters such as id, bid, or order
Correlate identifier values across requests to detect enumeration patterns from the same client
Apply web application firewall rules that flag rapid increments of resource identifiers in plugin URLs

Monitoring Recommendations

Forward WordPress and reverse proxy logs to a centralized analytics platform for retroactive hunting
Track outbound data volumes from the site to detect bulk record extraction
Alert on access to plugin endpoints from IP addresses without prior session cookies

How to Mitigate CVE-2026-52699

Immediate Actions Required

Update VikRentCar to a version newer than 1.4.5 once the maintainer publishes a fix
Restrict access to plugin endpoints using IP allowlists or authentication gateways until a patch is applied
Audit existing booking records to determine whether unauthorized access has already occurred

Patch Information

Consult the Patchstack Vulnerability Report for current patch status and recommended versions. Apply the vendor-provided update through the WordPress plugin manager once available.

Workarounds

Deploy a web application firewall rule that blocks unauthenticated requests to VikRentCar object endpoints
Disable the VikRentCar plugin on production sites that do not require live booking functionality
Place the WordPress site behind an authentication proxy for administrative and booking paths

bash

# Example WAF rule (ModSecurity) blocking unauthenticated access to VikRentCar object IDs
SecRule REQUEST_URI "@rx /wp-admin/admin-ajax\.php" \
  "chain,phase:2,deny,status:403,id:1026526990,msg:'Block unauthenticated VikRentCar IDOR access'"
SecRule ARGS:action "@rx vikrentcar" "chain"
SecRule &REQUEST_COOKIES:wordpress_logged_in "@eq 0"