CVE-2017-17091

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2022-05-13. NVD baseline CVSS 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 7%CVSS: 8.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
8.8
EG Score
8.8(medium)
EG Risk
47(Track)
EG Risk 47/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity88% × 45%
Exploitation8% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
7%
EPSS %ILE
94%
KEV
Not listed

Published

December 2, 2017

Last Modified

June 17, 2026

Advisory Details (5)

Auto-updated Aug 18, 2026
Patch available. Sources: github_commit.
github_commit

commit eaf1cfdc1fe0 (WordPress/WordPress)

Fix landed in WordPress/WordPress commit eaf1cfdc1fe0 — awaiting tagged release

https://github.com/WordPress/WordPress/commit/eaf1cfdc1fe0bdffabd8d879c591b864d833326c
generic

SecurityFocus

http://www.securityfocus.com/bid/102024
generic

[SECURITY] [DSA 4090-1] wordpress security update

https://www.debian.org/security/2018/dsa-4090
generic

WordPress 4.9.1 Security and Maintenance Release – WordPress News

https://wordpress.org/news/2017/11/wordpress-4-9-1-security-and-maintenance-release/
generic Patch Available

[SECURITY] [DLA 1216-1] wordpress security update

https://lists.debian.org/debian-lts-announce/2017/12/msg00019.html

Affected Packages

(7 across 7 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
wordpress—4.9.1+dfsg-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
wordpress—4.9.1+dfsg-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
wordpress—4.9.1+dfsg-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
wordpress—4.9.1+dfsg-1—
Debian:7(1)
PackageVulnerable rangeFixed inDependents
wordpress3.5.1+dfsg-2 ... 3.6.1+dfsg-1~deb7u9 (32 versions)3.6.1+dfsg-1~deb7u20—
Debian:8(1)
PackageVulnerable rangeFixed inDependents
wordpress4.1+dfsg-1 ... 4.1+dfsg-1+deb8u9 (16 versions)4.1+dfsg-1+deb8u16—
Debian:9(1)
PackageVulnerable rangeFixed inDependents
wordpress4.7.5+dfsg-2, 4.7.5+dfsg-2+deb9u1, 4.7.5+dfsg-2+deb9u1~bpo8+1, 4.7.5+dfsg-2+deb9u2~bpo8+14.7.5+dfsg-2+deb9u2—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 5× in last 7d / 26× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 123 total refreshes for this CVE.

  1. 2026-08-25 13:44 UTCEPSS rescore
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Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2017-17091?
CVE-2017-17091 is a high vulnerability published on December 2, 2017. 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.
When was CVE-2017-17091 disclosed?
CVE-2017-17091 was first published in the National Vulnerability Database on December 2, 2017, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2017-17091 actively exploited?
CVE-2017-17091 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 7% probability of exploitation in the next 30 days, which ranks it in the top 6.3% of all scored CVEs.
What is the CVSS score of CVE-2017-17091?
CVE-2017-17091 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2017-17091?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2017-17091, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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