CVE-2017-17091

high
Published 2017-12-02 · Modified 2026-05-13
CVSS v3
8.8
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v2
6.5
VIR risk
8.8

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.

Predictions

Exploit likelihood
92%
Patch ETA

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2017-17091

vendor Authored 2026-05-27

Vendor advisory: cve@mitre.org — https://wordpress.org/news/2017/11/wordpress-4-9-1-security-and-maintenance-release/

vendor Authored 2026-05-27

Vendor advisory: cve@mitre.org — https://github.com/WordPress/WordPress/commit/eaf1cfdc1fe0bdffabd8d879c591b864d833326c

vendor Authored 2026-05-27

Vendor advisory: cve@mitre.org — https://codex.wordpress.org/Version_4.9.1

OS impact

OSVersionStatusFixed in
debian debianbookwormfixed4.9.1+dfsg-1
debian debianbullseyefixed4.9.1+dfsg-1
debian debianforkyfixed4.9.1+dfsg-1
debian debiansidfixed4.9.1+dfsg-1
debian debiantrixiefixed4.9.1+dfsg-1

Application impact

VendorProductVersionsFixed
wordpresswordpress{"endIncluding":"4.9"}

References

CWEs

CWE-330

Verify integrity in audit chain (admin only). AS-IS.