High severity · published Dec 2, 2017
CVE-2017-17091
wp-admin/user-new.php in WordPress before 4.9.1 sets the newbloguser key to a string that can be directly derived from the user ID, which allows remote attackers to bypass…
8.8
CVSS
7%
EPSS
No
On KEV
Description
wp-admin/user-new.php in WordPress before 4.9.1 sets the newbloguser key to a string that can be directly derived from the user ID, which allows remote attackers to bypass intended access restrictions by entering this string.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)7.0% · higher than 94% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WO
WordPress · WordPress
through 4.9 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-17091
CVE.org
https://www.cve.org/CVERecord?id=CVE-2017-17091
Third Party Advisory
http://www.securityfocus.com/bid/102024
Patch
https://codex.wordpress.org/Version_4.9.1
Patch
https://github.com/WordPress/WordPress/commit/eaf1cfdc1fe0bdffabd8d879c591b864d833326c
lists.debian.org
https://lists.debian.org/debian-lts-announce/2017/12/msg00019.html
Release Notes
https://wordpress.org/news/2017/11/wordpress-4-9-1-security-and-maintenance-release/
Third Party Advisory
https://wpvulndb.com/vulnerabilities/8969
More from WordPress
9.8
CVE-2026-63030
WordPress < 7.0.2 - REST API batch-route confusion and SQL injection issue leading to Remote Code Execution
9.8
CVE-2020-25213
WordPress File Manager Plugin Remote Code Execution Vulnerability
9.8
CVE-2016-10033
The mailSend function in the isMail transport in PHPMailer before 5.2.18 might allow remote attackers to pass extra parameters to the mail command and consequently execute…
8.1
CVE-2026-87902
WordPress Core Remote File Inclusion Vulnerability
7.5
CVE-2020-11738
WordPress Snap Creek Duplicator Plugin File Download Vulnerability