CVE-2022-24747 is a medium-severity vulnerability affecting the Shopware platform, an open commerce system built on the Symfony PHP framework and Vue.js. The vulnerability arises from improper handling of sensitive HTTP headers related to caching. Specifically, affected versions of Shopware prior to 6.4.8.2 do not correctly set HTTP headers to prevent caching of sensitive information. When an HTTP cache (such as a proxy cache, CDN, or browser cache) exists between the Shopware server and the client, these sensitive headers may be stored and subsequently exposed to unauthorized actors who can access the cache. This exposure can lead to leakage of sensitive information that should otherwise be protected. The issue is categorized under CWE-200, which relates to the exposure of sensitive information to unauthorized parties. The vulnerability does not require authentication or user interaction to be exploited, but it depends on the presence of an HTTP cache in the network path. No known exploits have been reported in the wild, and the issue was resolved in Shopware version 6.4.8.2. No workarounds are available, so patching is the primary remediation method.

For European organizations using Shopware versions prior to 6.4.8.2, this vulnerability poses a risk of sensitive data exposure through intermediary HTTP caches. This could include customer data, session tokens, or other confidential headers that might be cached improperly. The impact primarily affects confidentiality, as unauthorized actors with access to the cache could retrieve sensitive information without needing to compromise the Shopware server directly. The integrity and availability of the platform are not directly impacted by this vulnerability. Given Shopware's popularity among European e-commerce businesses, especially small to medium enterprises, the risk is significant for organizations relying on HTTP caching infrastructure such as reverse proxies, CDNs, or shared network caches. Exposure of sensitive information could lead to privacy violations, regulatory non-compliance (e.g., GDPR), reputational damage, and potential financial losses due to data leakage.

The definitive mitigation is to upgrade all affected Shopware instances to version 6.4.8.2 or later, where the issue has been fixed. Organizations should audit their Shopware deployments to identify versions below 6.4.8.2 and prioritize patching. Additionally, review and configure HTTP caching layers to ensure that sensitive headers are not cached. This includes setting appropriate Cache-Control headers such as 'no-store' or 'private' on responses containing sensitive information. Network administrators should verify that reverse proxies, CDNs, and other caching intermediaries respect these headers and are not configured to cache sensitive content inadvertently. If immediate patching is not feasible, temporarily disabling caching for sensitive endpoints or headers can reduce exposure risk. Monitoring network traffic and cache logs for unusual access patterns may help detect potential unauthorized access to cached sensitive data. Finally, organizations should review their data protection policies to ensure compliance with GDPR and other relevant regulations concerning data exposure.