Stop User Enumeration plugin <1.3.9 — User Enumeration
CVE-2017-1000226Published · Updated Action summary
Affected: <1.3.9Update to 1.3.9 or newer
All remediation steps- Severity
- Medium5.3
- CVSS
- 5.3CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:NWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:NPrivileges required- None
UI:NUser interaction- None
S:UScope- Unchanged
C:LConfidentiality- Low
I:NIntegrity- None
A:NAvailability- None
- Weakness
- CWE-200 Information Exposure
- Required access
- No account needed
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
Stop User Enumeration stop-user-enumeration
- Affected< 1.3.9
- Patched in1.3.9
Update to 1.3.9 or newer.
You are affected if you run < 1.3.9. Version 1.3.9 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Stop User Enumeration.
- No admin access? Run a passive check of your site. It reads public files only.
- No account is needed to exploit this. Treat any exposed site on an affected version as at risk.
What to do
- Update to version 1.3.9, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch Stop User Enumeration to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to Mallory Adams.
The Stop User Enumeration plugin for WordPress is vulnerable to User Enumeration in versions up to, and including, 1.3.8. This is due to a flaw that was found in the REST API. This makes it possible for unauthenticated attackers to perform a POST request in the REST API allows simulating different request types. As such, attackers can perform a POST request with the “users” string in the body of the request, and tell the REST API to act like it’s received a GET request.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in Stop User Enumeration
All 8| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium5.3 | Protection Mechanism Bypass ≤1.7.2Update to 1.7.3 | CVE-2025-4302 | |
| Medium6.1 | Reflected Cross-Site Scripting via fs_request_get ≤1.9.2No patch available | CVE-2023-33999 | |
| High8.8 | Missing Authorization to Arbitrary Options Update <3.1.7Update to 3.1.7 | — | |
| Medium6.1 | Cross-Site Scripting <1.3.8Update to 1.3.8 | CVE-2017-18536 | |
| Medium5.3 | Unauthenticated Username Enumeration ≤1.3.8Update to 1.3.9 | — |
- Medium5.3Protection Mechanism Bypass
≤1.7.2Update to 1.7.3
- Medium6.1Reflected Cross-Site Scripting via fs_request_get
≤1.9.2No patch available
- High8.8Missing Authorization to Arbitrary Options Update
<3.1.7Update to 3.1.7
- Medium6.1Cross-Site Scripting
<1.3.8Update to 1.3.8
- Medium5.3Unauthenticated Username Enumeration
≤1.3.8Update to 1.3.9
Same weakness (Information Exposure)
All Information Exposure| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| High7.2 | Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header | CVE-2026-120688 | |
| Critical9.8 | Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission | CVE-2026-125055 | |
| Critical9.8 | Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter | CVE-2026-119077 | |
| Medium5.3 | Unauthenticated Sensitive Information Exposure in 'search' Parameter | CVE-2026-121518 |
- High7.2Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header
EZ SQL Reports Shortcode Widget and DB Backup
≤5.25.25Update to 5.26.45
- Critical9.8Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission
Chatterbug Forms – Fast, Flexible WordPress Form Builder
≤1.0.2Update to 1.1
- Critical9.8Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter
ELEX WordPress HelpDesk & Customer Ticketing System
≤3.3.9Update to 3.4.0
- Medium5.3Unauthenticated Sensitive Information Exposure in 'search' Parameter
Customer Reviews for WooCommerce
≤5.127.0Update to 5.128.0
Timeline
CVE published
Severity medium, CVSS 5.3
Record last updated
Sources & licenses
Wordfence record- Vulnerability data
- Wordfence Intelligence. [object Object] Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- [object Object]. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
- CVSS / CWE
- National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.