CVE-2024-39409: Adobe Commerce CSRF Vulnerability

CVE-2024-39409 Overview

CVE-2024-39409 is a Cross-Site Request Forgery (CSRF) vulnerability [CWE-352] affecting Adobe Commerce and Magento Open Source. The flaw impacts versions 2.4.7-p1, 2.4.6-p6, 2.4.5-p8, 2.4.4-p9 and earlier. An attacker can bypass security features and perform minor integrity changes on behalf of an authenticated user. Exploitation requires user interaction, typically by tricking the victim into clicking a crafted link or visiting a page that submits a malicious request. Adobe published the fix in security advisory APSB24-61.

Critical Impact
Successful exploitation allows attackers to modify limited application state on behalf of a victim user, bypassing CSRF protections to perform minor integrity changes without consent.

Affected Products

Adobe Commerce 2.4.4 through 2.4.4-p9, 2.4.5 through 2.4.5-p8, 2.4.6 through 2.4.6-p6, and 2.4.7 through 2.4.7-p1
Adobe Magento Open Source (same version ranges as Adobe Commerce)
Earlier unsupported Commerce and Magento releases in the 2.4.x branch

Discovery Timeline

2024-08-14 - CVE CVE-2024-39409 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2024-39409

Vulnerability Analysis

The vulnerability stems from missing or insufficient CSRF token validation on specific Adobe Commerce endpoints. CSRF defenses rely on verifying a per-session, unpredictable token on every state-changing request. When the token check is absent or inconsistently enforced, the browser's automatic inclusion of session cookies lets a third-party site issue authenticated requests on behalf of the logged-in user.

The scope is limited to minor integrity changes rather than confidentiality loss or availability impact. There is no privilege requirement for the attacker, but the victim must be authenticated to Commerce and must interact with attacker-controlled content.

Root Cause

The root cause maps to [CWE-352: Cross-Site Request Forgery]. One or more Commerce request handlers accept state-changing operations without validating the server-issued form_key or equivalent anti-CSRF token. The application also relies on ambient browser authentication (session cookie), which is forwarded automatically on cross-origin requests.

Attack Vector

An attacker hosts a page containing an auto-submitting form or embedded request targeting the vulnerable Commerce endpoint. When an authenticated Commerce user loads the page, the browser issues the request with the victim's session cookie. The server processes the request as legitimate because the anti-CSRF token check is missing. No credential theft or privilege escalation occurs; the attack is bounded to minor integrity modifications permitted to the victim's account.

See the Adobe Security Advisory APSB24-61 for vendor-specific technical details.

Detection Methods for CVE-2024-39409

Indicators of Compromise

Unexpected state-changing POST requests to Commerce endpoints with Referer or Origin headers pointing to third-party domains.
Requests to administrative or account-management endpoints missing a valid form_key parameter.
Short-interval sequences where a user loads an external page immediately followed by a sensitive request to the Commerce application.

Detection Strategies

Enable web server and application logging that captures Referer, Origin, and request body parameters for state-changing routes.
Deploy a Web Application Firewall (WAF) rule set that flags or blocks requests where the Origin header does not match the Commerce site's trusted origins.
Correlate authentication events with downstream account or configuration changes to identify requests triggered without a prior same-origin navigation.

Monitoring Recommendations

Alert on anomalous request patterns targeting account, cart, or configuration endpoints from unexpected referrers.
Monitor Commerce admin and customer account change logs for modifications performed within seconds of external site visits.
Track Adobe security advisory updates via the APSB24-61 bulletin for related issues.

How to Mitigate CVE-2024-39409

Immediate Actions Required

Apply the Adobe Commerce security patches released in APSB24-61 to all production and staging environments.
Inventory all Commerce and Magento Open Source instances and confirm their build matches a patched release.
Review recent account activity logs for suspicious state changes on customer or admin accounts since the publication date.

Patch Information

Adobe addressed CVE-2024-39409 in the updates described in Adobe Security Advisory APSB24-61. Upgrade to a release later than 2.4.7-p1, 2.4.6-p6, 2.4.5-p8, or 2.4.4-p9 depending on the deployed branch. Follow Adobe's standard upgrade procedure, including composer package updates and cache flushes, then validate that the admin panel and storefront operate normally.

Workarounds

Configure the WAF to reject state-changing requests when the Origin header is absent or does not match a trusted Commerce domain.
Set the session cookie SameSite attribute to Lax or Strict to prevent cross-site cookie attachment on state-changing requests.
Educate administrators and customers to avoid clicking untrusted links while logged in to the Commerce storefront or admin panel.

bash

# Nginx example: enforce SameSite and reject suspicious cross-origin POSTs
add_header Set-Cookie "PHPSESSID=$cookie_PHPSESSID; Path=/; HttpOnly; Secure; SameSite=Lax";

map $http_origin $allowed_origin {
    default 0;
    "https://commerce.example.com" 1;
}

if ($request_method = POST) {
    set $block 1;
}
if ($allowed_origin = 1) {
    set $block 0;
}
if ($block = 1) {
    return 403;
}