CVE-2024-34102

CVE-2024-34102 is an improper restriction of XML external entity reference (XXE) vulnerability (CWE-611) in Adobe Commerce and Magento Open Source, where the platform does not properly restrict external entities when processing XML, so an attacker who can submit crafted XML containing external entity references can have it parsed with attacker-controlled resources. XXE flaws classically enable local file disclosure and server-side request forgery, and in this case Adobe states the flaw allows remote code execution on the affected server. Any organization running a vulnerable Adobe Commerce or Magento Open Source storefront is affected, and because these are internet-facing e-commerce platforms that routinely process XML input, exposure is likely to be broad. The vulnerability was added to CISA's Known Exploited Vulnerabilities catalog on 2024-07-17, confirming exploitation in the wild, and its EPSS score of ~100% (100th percentile) indicates near-certain near-term exploitation activity; no public proof-of-concept is known and CVSS has not yet been scored. CISA lists ransomware use as unknown, so a ransomware connection should not be assumed.

What to do: Apply Adobe's security updates for Adobe Commerce and Magento Open Source per the vendor's June 2024 advisory (APSB24-40), or, per the CISA KEV required action, apply vendor-recommended mitigations or discontinue use of the product if patches are unavailable. Review any endpoints or integrations that accept XML from untrusted users and hunt for signs of XXE exploitation, such as unexpected outbound requests, anomalous file reads, or webshell artifacts. Continue monitoring Adobe and CISA KEV for updated mitigation guidance and remediation deadlines.