CVE-2024-30516: Booking Package Auth Bypass Vulnerability

CVE-2024-30516 Overview

CVE-2024-30516 is an Improper Validation of Specified Quantity in Input vulnerability affecting the SaasProject Booking Package plugin for WordPress. This vulnerability allows attackers to access functionality not properly constrained by Access Control Lists (ACLs), enabling price manipulation attacks against e-commerce booking systems.

Critical Impact

Attackers can manipulate booking prices and quantities through improper input validation, potentially causing significant financial losses for affected businesses.

Affected Products

• SaasProject Booking Package plugin for WordPress versions through 1.6.27

Discovery Timeline

• 2026-01-05 - CVE-2024-30516 published to NVD
• 2026-01-08 - Last updated in NVD database

Technical Details for CVE-2024-30516

Vulnerability Analysis

This vulnerability stems from improper validation of user-supplied quantity input values within the Booking Package WordPress plugin. The affected plugin fails to properly validate and sanitize quantity parameters submitted during the booking process, allowing attackers to bypass intended access controls and manipulate pricing data.

The weakness is classified under CWE-1284 (Improper Validation of Specified Quantity in Input), indicating that the application does not properly verify that input quantities fall within expected bounds or acceptable values before processing them.

Root Cause

The root cause of this vulnerability lies in the plugin's failure to implement proper server-side validation for quantity-related input fields. When users submit booking requests, the application accepts and processes quantity values without adequately verifying that they conform to expected constraints. This allows malicious actors to submit manipulated values that bypass price calculations or access control mechanisms.

Attack Vector

The vulnerability is exploitable over the network without authentication. An attacker can intercept and modify HTTP requests during the booking process to alter quantity or price-related parameters. Since the server-side validation is insufficient, the manipulated values are processed, potentially resulting in:

• Bookings at manipulated (lower) prices
• Bypass of quantity restrictions or limits
• Access to booking functionality beyond intended permissions

The attack does not require user interaction and can be exploited by any unauthenticated remote attacker with network access to the vulnerable WordPress installation. For detailed technical information, see the Patchstack Vulnerability Database Entry.

Detection Methods for CVE-2024-30516

Indicators of Compromise

• Unusual booking transactions with abnormally low or zero prices
• Unexpected quantity values in booking database records that exceed normal limits
• Web server logs showing modified POST parameters related to booking submissions
• Multiple rapid booking attempts from the same source with varying parameter values

Detection Strategies

• Monitor web application firewall (WAF) logs for suspicious parameter manipulation in booking-related requests
• Implement anomaly detection for booking transactions that deviate significantly from expected pricing
• Review server access logs for patterns of parameter tampering in booking form submissions
• Set up alerts for bookings where final price doesn't match expected calculations based on quantity and unit price

Monitoring Recommendations

• Enable detailed logging for all booking transactions including submitted and processed values
• Configure price validation alerts to flag transactions where client-submitted prices differ from server-calculated prices
• Implement real-time monitoring of booking plugin activity for signs of exploitation
• Regularly audit completed bookings to identify any anomalies in pricing or quantities

How to Mitigate CVE-2024-30516

Immediate Actions Required

• Update the Booking Package plugin to a version newer than 1.6.27 that contains the security fix
• Review recent booking transactions for signs of price manipulation
• Implement WAF rules to validate quantity and price parameters on booking submissions
• Consider temporarily disabling the booking functionality until patched if update is not immediately possible

Patch Information

Update the SaasProject Booking Package WordPress plugin to a version higher than 1.6.27. Check the Patchstack Vulnerability Database for the latest patched version information and vendor guidance.

Workarounds

• Implement server-side price recalculation that ignores client-submitted price values entirely
• Add WAF rules to reject requests with suspicious quantity or price parameter modifications
• Enable strict input validation at the web server level for booking-related endpoints
• Consider using a security plugin that provides additional input validation and request filtering

# Example WAF rule concept for ModSecurity to detect price manipulation attempts
# Add to your ModSecurity configuration
SecRule ARGS:quantity "!@rx ^[1-9][0-9]?$" \
    "id:100001,phase:2,deny,status:403,msg:'Invalid booking quantity parameter'"