High severity · published Aug 28, 2026
CVE-2026-19423
Ultimate Member 2.6.7 - 2.12.1 - Unauthenticated Privilege Escalation via Role Field on Profile Forms
8.1
CVSS
0.4%
EPSS
No
On KEV
Description
The Ultimate Member WordPress plugin before 2.13.0 does not validate a submitted role selection when it cannot resolve the set of roles a profile form permits, and screens the value against the site's registered role names rather than against the form's own allow-list, allowing unauthenticated users who register through the Ultimate Member WordPress plugin before 2.13.0's own form to grant themselves arbitrary capabilities and reach administrator-equivalent access.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 32% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
UM
Ultimate Member ·
2.6.7 before 2.13.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-19423
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-19423
wpscan.com
https://wpscan.com/vulnerability/3cdc8700-165a-4787-a3d0-b0914865b07b/
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