CVE-2026-21290
HIGHCVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Lifecycle Timeline
2Tags
Description
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.
Analysis
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. …
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Remediation
Within 24 hours: Inventory all Adobe Commerce instances and identify deployed 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); enable WAF rules to filter malicious script injection in form submissions; restrict form field access to trusted administrators only. Within 7 days: Conduct security audit of form fields for existing XSS payloads; implement input validation and output encoding on all user-facing forms; disable non-critical form functionality if patches cannot be applied immediately. …
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