Vulnerability record · CVE-2026-109307 · published 12 October 2026

CVE-2026-109307: Cross-site scripting vulnerability

Craft CMS 5.0.0 before 5.10.14 contains a DOM-based cross-site scripting vulnerability in the control panel login and 2FA verification flow, where a user-controlled returnUrl accepting javascript: URLs is used in client-side navigation. Attackers can lure a 2FA-enabled victim into opening a crafted /admin/login?verify=1 URL between password submission and TOTP verification, executing JavaScript in the authenticated control panel with the victim's permissions.

2.1 CVSS 4.0 Low EPSS 0.19% · top 92.5% CWE-79 · Cross-site scripting Awaiting Analysis

2.1CVSS 4.0 base score

0.19%EPSS exploitation probability, 30 days

NoNot in CISA KEV

0Affected product versions listed by NVD

2References

15 Oct 2026Last modified by NVD

Description

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

Link	Tags
https://github.com/craftcms/cms/security/advisories/GHSA-w5rh-mhxj-wr8r
https://www.vulncheck.com/advisories/craft-cms-5.0.0-before-5.10.14-dom-xss-via-returnurl-in-2fa-verification

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Source: NIST National Vulnerability Database (record CVE-2026-109307), CISA KEV, FIRST EPSS (scores of 2026-10-14). This page is refreshed as NVD updates the record.