Commerce
CVE-2026-21290
HIGH
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessLow-privileged attacker injects XSS payload
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DeliveryMalicious script stored in form field
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ExploitVictim visits page containing payload
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ExecutionJavaScript executes in victim's browser
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PersistSession token stolen
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ImpactAttacker hijacks victim session
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Output encoding, context-aware escaping
MITRE ATT&CK
2 techniques across 2 tactics: Initial Access, Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Exploitation Conditions | Adobe Commerce versions 2.4.9-alpha3, 2.4.8-p3, 2.4.7-p8, 2.4.6-p13, 2.4.5-p15, 2.4.4-p16 or earlier; attacker requires low-privileged admin or backend user account; victim must visit page with injected form field. |
| Impact | CVSS 8.7 (HIGH). Attack vector: Network. Complexity: Low. Privileges required: Low. User interaction: Required. |
| Exploit ScenarioDerived | An attacker could exploit this vulnerability to compromise the affected system. |
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Alert meAnalysisAIv1 – Mar 12, 2026
Stored XSS in Adobe Commerce and Magento versions 2.4.9-alpha3 through 2.4.4-p16 allows authenticated attackers to inject malicious scripts into form fields that execute in victims' browsers, enabling session hijacking and data theft. Exploitation requires user interaction when a victim visits a page containing the compromised field. No patch is currently available.
Earlier versions of this analysis (1)
Adobe Commerce versions 2.4.9-alpha3, 2.4.8-p3, 2.4.7-p8, 2.4.6-p13, 2.4.5-p15, 2.4.4-p16 and earlier are affected by a stored Cross-Site Scripting (XSS) vulnerability that could be abused by a low-privileged attacker to inject malicious scripts into vulnerable form fields. [CVSS 8.7 HIGH]
RemediationAI
Monitor vendor advisories for a patch. Implement output encoding and Content Security Policy headers. Restrict network access to the affected service where possible.
Affects your stack
Find out whether the stacks and servers you run are on an affected version.
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
Classified as CWE-79 (Cross-site Scripting (XSS)). Affects Commerce B2B. Adobe Commerce versions 2.4.9-alpha3, 2.4.8-p3, 2.4.7-p8, 2.4.6-p13, 2.4.5-p15, 2.4.4-p16 and earlier are affected by a stored Cross-Site Scripting (XSS) vulnerability that could be abused by a low-privileged 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. A successful attacker can abuse this to achieve session takeover, increasing the confidentiality, and in
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Primary rating from Vendor (adobe) · only source for this CVE.
CVSS VectorVendor: adobe
DescriptionCVE.org
Adobe Commerce versions 2.4.9-alpha3, 2.4.8-p3, 2.4.7-p8, 2.4.6-p13, 2.4.5-p15, 2.4.4-p16 and earlier are affected by a stored Cross-Site Scripting (XSS) vulnerability that could be abused by a low-privileged 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. A successful attacker can abuse this to achieve session takeover, increasing the confidentiality, and integrity impact to high. Exploitation of this issue requires user interaction in that a victim must browse to the page containing the vulnerable field.
Executive ViewAI
Adobe Commerce installations are vulnerable to stored cross-site scripting (XSS) attacks that allow attackers with basic user privileges to inject malicious code affecting all users who interact with compromised forms. This vulnerability poses a direct risk to customer data, session credentials, and business reputation, particularly for organizations processing sensitive information through Commerce forms.
Deploy WAF rules to detect and block common XSS payloads in form fields; implement strict input validation and sanitization on all form submissions; apply Content Security Policy (CSP) headers to restrict inline script execution; conduct regular penetration testing of form inputs; restrict user role permissions to limit who can populate vulnerable form fields; enable audit logging on all form modifications; consider temporarily disabling non-essential forms until patch availability; segment Commerce infrastructure from critical systems where possible.
Threat Intelligence Overview
NVD
CVE.org
EPSS
VulDB
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Cross-Site Scripting occurs when an application accepts untrusted data and sends it to a web browser without proper validation or encoding.
Affected Products (CPE)CVE.org
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GitHub PoC
Exploit-DB