What is the CVSS score of CVE-2026-21284?

CVE-2026-21284 has a CVSS 3.1 base score of 8.1 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N. EPSS exploitation probability: 0.1%.

Which versions of Magento are affected by CVE-2026-21284?

Adobe Commerce installations are vulnerable to stored XSS attacks that could allow high-privileged users to inject malicious scripts, potentially compromising customer data, session tokens, and…

How to fix or mitigate CVE-2026-21284?

Within 24 hours: inventory all Adobe Commerce deployments and their versions to identify affected systems; disable non-essential administrative access until mitigation is confirmed. Within 7 days: deploy WAF rules to detect and block XSS payloads in form submissions; implement strict input validation and output encoding on vulnerable form fields; restrict administrative panel access to specific IP ranges. Within 30 days: monitor Adobe security advisories for patch availability; establish a vendor communication protocol to receive timely patch notifications; conduct security testing of custom form implementations.

Magento CVE-2026-21284

HIGH

Cross-site Scripting (XSS) (CWE-79)

2026-03-11 psirt@adobe.com

XSS Adobe Magento Commerce Commerce B2b

8.1

CVSS 3.1 · Vendor: adobe

Severity by source

Vendor (adobe) PRIMARY

8.1 HIGH

AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N

Primary rating from Vendor (adobe) · only source for this CVE.

CVSS VectorVendor: adobe

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

Required

Scope

Changed

Confidentiality

High

Integrity

High

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 22:06 vuln.today

CVE Published

Mar 11, 2026 - 03:15 nvd

HIGH 8.1

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 high-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.

AnalysisAI

Stored XSS in Adobe Commerce versions 2.4.9-alpha3 through 2.4.4-p16 enables high-privileged attackers to inject malicious scripts into form fields, which execute in victim browsers during page visits. An attacker exploiting this vulnerability can achieve session hijacking and compromise both confidentiality and integrity, though successful exploitation requires user interaction and administrative privileges. No patch is currently available.

Technical ContextAI

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 high-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 i

RemediationAI

Monitor vendor advisories for a patch. Implement output encoding and Content Security Policy headers. Restrict network access to the affected service where possible.