Medium severity · published Oct 12, 2026
CVE-2026-109307
Craft CMS 5.0.0 before 5.10.14 DOM XSS via returnUrl in 2FA Verification
4.7
CVSS
0.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 8% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CM
cms · craftcms
5.0.0 before 5.10.14 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-109307
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-109307
vendor-advisory
https://github.com/craftcms/cms/security/advisories/GHSA-w5rh-mhxj-wr8r
third-party-advisory
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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