CVE-2026-76200 in Commerce
Summary
by MITRE • 09/09/2026
Adobe Commerce is affected by a stored Cross-Site Scripting (XSS) vulnerability that could be abused by an attacker to inject malicious scripts into vulnerable form fields. Malicious JavaScript may be executed in a victim's browser when they browse to the page containing the vulnerable field, potentially gaining elevated access or control over the victim's account or session. Scope is changed.
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Analysis
by VulDB Data Team • 09/09/2026
Adobe Commerce contains a stored Cross-Site Scripting vulnerability that allows attackers to inject malicious scripts into form fields within the application interface. Unlike reflected XSS where the payload is delivered via a link, this flaw persists on the server side because the injected script is saved in the database or other storage mechanisms associated with user input. This persistence ensures that every time an authorized user accesses the affected page containing the vulnerable field, their browser will execute the malicious JavaScript code without requiring further interaction from the attacker to trigger it again. The vulnerability stems from insufficient validation and sanitization of user-supplied data before it is stored and subsequently rendered in HTML contexts by the application backend or frontend rendering engine.
The operational impact of this vulnerability is significant because it enables an attacker to gain elevated access or control over victim accounts and sessions. By executing arbitrary JavaScript in the context of a legitimate user, the attacker can perform actions such as stealing session cookies, capturing authentication tokens, performing unauthorized transactions on behalf of the victim, or defacing the application interface. Since Adobe Commerce is often used for critical e-commerce operations involving sensitive customer data and financial information, successful exploitation could lead to severe confidentiality breaches, integrity violations, and availability issues. The scope change indicates that this vulnerability may affect a broader set of components or user roles than previously identified, potentially including administrative interfaces where the impact would be even more devastating due to higher privilege levels associated with those accounts.
From a technical classification perspective, this issue aligns with CWE-79 Improper Neutralization of Input During Web Page Generation commonly known as Cross-site Scripting and specifically falls under Stored XSS variants often categorized in MITRE ATT&CK techniques such as T1059 Command and Scripting Interpreter or T1204 User Execution depending on the specific delivery mechanism. The persistence aspect also relates to CWE-83 Improper Input Validation where input is not adequately sanitized before storage. Security researchers emphasize that stored XSS vulnerabilities are particularly dangerous because they do not require social engineering tactics like phishing links; instead, they rely on the victim simply visiting a compromised page or viewing content created by another user who may have been tricked into submitting malicious data initially.
Mitigation strategies for this vulnerability involve implementing robust input validation and output encoding mechanisms across all form fields in Adobe Commerce applications. Developers should ensure that any user-supplied data is strictly validated against expected formats using allowlists rather than blocklists to prevent bypasses through obfuscation techniques. Furthermore, context-aware output encoding must be applied when rendering stored content back into HTML documents to neutralize special characters such as angle brackets and quotes that are essential for script execution. Web Application Firewalls can provide an additional layer of defense by detecting and blocking known XSS payloads in HTTP requests, although this should not replace proper code-level fixes. Adobe has likely released patches or updates addressing these specific input handling flaws, so administrators must apply the latest security advisories and version upgrades immediately to close the exposure window. Regular security audits and penetration testing focusing on stored data flows are recommended to identify similar weaknesses before they can be exploited in production environments.