CVE-2024-50654 is an incorrect access control vulnerability found in lilishop versions up to 4.2.4. The vulnerability arises because the application fails to properly enforce coupon quantity limits when processing coupon collection requests. Attackers can exploit this by capturing the data packets sent during coupon collection and replaying them multiple times in rapid succession (high concurrency), effectively bypassing the intended quantity restrictions. This flaw does not require any authentication or user interaction, making it remotely exploitable over the network. The core issue relates to CWE-346, indicating improper authorization checks. The impact is primarily on the integrity of the coupon system, allowing attackers to obtain more coupons than permitted, which can lead to financial losses and abuse of promotional campaigns. No patches or fixes have been officially released at the time of publication, and no active exploitation has been reported. The CVSS v3.1 score of 7.5 reflects a high severity, with network attack vector, low attack complexity, no privileges required, and no user interaction needed. The vulnerability affects the coupon management logic within lilishop, a platform used for e-commerce solutions, which may be deployed in various countries with active online retail sectors.

The primary impact of CVE-2024-50654 is the compromise of coupon system integrity, allowing attackers to obtain an unlimited number of coupons beyond the intended quantity limits. This can lead to significant financial losses for organizations relying on lilishop for promotional campaigns, as attackers can abuse coupons to reduce revenue or disrupt marketing strategies. The vulnerability does not affect confidentiality or availability directly but undermines trust in the e-commerce platform and may cause reputational damage. Organizations may face increased fraud, loss of customer confidence, and potential legal or compliance issues if promotional abuse is widespread. The ease of exploitation and lack of required privileges increase the risk of automated attacks, especially in high concurrency environments. While no known exploits are reported yet, the vulnerability's characteristics make it a likely target for attackers seeking financial gain or to disrupt e-commerce operations.

To mitigate CVE-2024-50654, organizations should implement the following specific measures: 1) Monitor network traffic for repeated coupon collection requests from the same source or with identical data packets to detect replay attacks. 2) Implement server-side rate limiting and concurrency controls on coupon redemption endpoints to prevent rapid repeated submissions. 3) Introduce cryptographic nonce or token-based validation mechanisms to ensure each coupon redemption request is unique and cannot be replayed. 4) Enforce strict server-side authorization checks that verify coupon quantity limits before processing requests, independent of client-side controls. 5) Apply web application firewalls (WAFs) with custom rules to detect and block suspicious coupon-related traffic patterns. 6) Engage with lilishop vendors or developers to obtain patches or updates addressing this vulnerability as soon as they become available. 7) Conduct thorough security testing and code reviews focusing on access control and concurrency handling in coupon management modules. 8) Educate staff and customers about potential coupon abuse and establish incident response plans to quickly address detected exploitation attempts.