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CVE-2017-17091

31
FAUCET Score

CVE-2017-17091 describes a critical access restriction bypass vulnerability in WordPress versions prior to 4.9.1, specifically within the wp-admin/user-new.php component. Attackers can exploit this by deriving the newbloguser key from the user ID, enabling unauthorized access. This vulnerability carries a high CVSS score of 8.8, indicating a network-exploitable flaw with low attack complexity that can lead to high impact on confidentiality, integrity, and availability. While no public exploit code or active exploitation has been observed, and community discussion is minimal, the high FAUCET Risk Score of 75/100 suggests a significant potential threat.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.9CPE matchmatch criteria
cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.8HIGH

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
8.20%
Probability of exploitation in next 30 days
EPSS Percentile
94.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0820 is in the 93rd percentile among its peer group of 17,844 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

codex.wordpress.org / Version_4.9.1
PatchRelease Notes
github.com / WordPress/WordPress/commit/eaf1cfdc1fe0bdffabd8d879c591b864d833326c
Patch
lists.debian.org / debian-lts-announce/2017/12/msg00019.html
wordpress.org / news/2017/11/wordpress-4-9-1-security-and-maintenance-release
Release Notes
wpvulndb.com / vulnerabilities/8969
Third Party AdvisoryVDB Entry
debian.org / security/2018/dsa-4090
securityfocus.com / bid/102024
Third Party AdvisoryVDB Entry