Is CVE-2017-17091 in the CISA KEV catalog?

No. CVE-2017-17091 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2017-17091?

CVE-2017-17091 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2017-17091?

CVE-2017-17091 has an EPSS score of 8.20% (94th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2017-17091?

Upgrade wordpress on debian 11 to 4.9.1+dfsg-1 or later.

CVE & CISA-KEV Catalog

CVE-2017-17091

HIGHEPSS 94th pctl

8.8

CVSS v3

NVD

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.

CWE-330

How to fix

Remediation Available

wordpressDebian

Fixed in:4.9.1+dfsg-1CVE-2017-17091

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

8.20%probability of exploitation in 30 days

94thpercentile

High risk: more likely to be exploited than 94% of all known CVEs.

References

Patch2

Third-Party Advisory2

Release Notes1

wordpress.org

Other references2

Related Vulnerabilities

Other CWE-330 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2019-5420	Critical	9.8	92%	-	Fix
CVE-2021-34646	Critical	9.8	51%	-	-
CVE-2008-0087	High	7.5	32%	-	-
CVE-2017-6026	Critical	9.1	32%	-	-
CVE-2018-17888	Critical	9.8	30%	-	-
CVE-2020-11901	Critical	9.0	21%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-13.