CVE-2026-21291

high-risk

Published 2026-03-11

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. Exploitation of this issue requires user interaction in that a victim must browse to the page containing the vulnerable field.

Do I need to act?

0.08% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 4.8/10 Medium

NETWORK / LOW complexity

Affected Products (20)

Commerce B2B

Affected Vendors

Adobe

References (1)

Vendor Advisory https://helpx.adobe.com/security/products/magento/apsb26-05.html

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high-risk

Severity 19/34 · Moderate

Exploitability 0/34 · Minimal

Exposure 33/34 · Critical