Unauthenticated RCE via checkout input-validation flaw in Adobe Commerce/Magento
CISA: Adobe Commerce and Magento Open Source Improper Input Validation Vulnerability
CVSS 3.1
9.8critical
EPSS
99%p100
Published
()
KEV added
AI analysis
Adobe Commerce and Magento Open Source versions 2.4.3-p1 and earlier and 2.3.7-p2 and earlier contain an improper input validation flaw (CWE-20) in the checkout process. A remote attacker can trigger it with no privileges and no user interaction by submitting crafted input to a store's checkout flow, and successful exploitation results in arbitrary code execution on the server hosting the storefront. Any Adobe Commerce or Magento Open Source storefront running the affected versions is exposed, and because these are internet-facing e-commerce sites the practical exposure is broad. Exploitation is confirmed in the wild: the flaw is in CISA's Known Exploited Vulnerabilities catalog (added 2022-02-15), its EPSS exploitation probability is 99.2% (100th percentile), and news reports describe ongoing attacks against Magento 2 stores, including recurring 'Xurum' attack campaigns and template-based attacks.
What to do: Upgrade every store to an Adobe-patched release per the vendor's instructions - i.e., any release newer than 2.4.3-p1 on the 2.4.x line or newer than 2.3.7-p2 on the 2.3.x line - noting that headlines indicate companion Magento CVEs were fixed in the same patch release, so consult Adobe's advisory for the full list. Because exploitation is unauthenticated and confirmed in the wild, prioritize internet-facing shops; WAF rules may reduce risk, but reports indicate WAF bypasses in related Magento attacks, so patching is the only reliable fix. After patching, review web server and application logs for exploitation attempts against the checkout flow and check affected hosts for indicators of compromise.
Affected
Adobe Commerce
2.4.3-p1 and earlier; 2.3.7-p2 and earlier
Adobe Magento Open Source
2.4.3-p1 and earlier; 2.3.7-p2 and earlier
Estimated exposure
massroughly 100,000-300,000 online storefronts (Magento/Adobe Commerce is among the most widely deployed e-commerce platforms) — Public adoption surveys and internet-wide scans have long ranked Magento/Adobe Commerce among the top e-commerce platforms with on the order of 10^5 live stores, and virtually all of these expose their storefront and checkout endpoints…
Order-of-magnitude estimate by the model from install counts, market share and public scan data it knows; verify before quoting.
Description
Adobe Commerce versions 2.4.3-p1 (and earlier) and 2.3.7-p2 (and earlier) are affected by an improper input validation vulnerability during the checkout process. Exploitation of this issue does not require user interaction and could result in arbitrary code execution.
Critical unauthenticated RCE zero-day CVE-2026-75650 (StyleSmuggler) in Adobe Commerce and Magento is actively exploited; Adobe shipped hotfix VULN-39341 on September 7.
CVE-2026-75650 is a CVSS 10.0 unauthenticated remote code execution flaw in Adobe Commerce 2.4.4-2.4.9, Adobe Commerce B2B 1.3.3-1.5.3, and Magento Open Source 2.4.6-2.4.9, exploited via malicious style properties that inject PHP code executed through a transactional email template. Active exploitation began September 4, 2026, three days before Adobe released Hotfix VULN-39341 (APSB26-146) on September 7, with multiple victim stores confirmed by Sansec and Disrex across at least two distinct campaigns. Attackers deploy a persistent implant at ~/.local/share/.gvfsd/gvfsd-user masquerading as kworker, fc-cache, or chronyd, sustained by a cron job, while a second operator dropped a PHP web shell in product image caches. Tenable classified it as a Vulnerability of Interest; it is not yet in CISA KEV as of September 8, and Adobe also recommends rotating encryption keys and all protected credentials.