XSS in Adobe Commerce
CVE-2026-21290
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.005 (36.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 36.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Adobe Commerce — versions 0
- Adobe Commerce B2b
- Adobe Commerce — versions 2.4.4, 2.4.5, 2.4.6
- Adobe Commerce B2b — versions 1.3.3, 1.3.4, 1.3.5
- Adobe Magento — versions 2.4.5, 2.4.6, 2.4.7
- Adobe Magento Open Source
Weakness classification (CWE)
References
- helpx.adobe.com/security/products/magento/apsb26-05.html (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-21290?
- CVE-2026-21290 is a high-severity vulnerability in Adobe Commerce, classified under Cross-site Scripting. CVSS score: 8.7/10. Published 2026-03-11.
- How severe is CVE-2026-21290?
- High severity. CVSS v3 base score is 8.7 out of 10.