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WordPress plugin

Stop User Enumeration <= 1.3.4 — Username Enumeration Bypasses

e7d4830b-f60a-4556-b40f-1bf9d5a296adPublished · Updated

Action summary

Affected: ≤1.3.4Update to 1.3.5 or newer

All remediation steps
Watch plugin
Severity
Medium5.3
CVSS
5.3
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
What does this vector mean?
AV:N Attack vector
Network
AC:L Attack complexity
Low
PR:N Privileges required
None
UI:N User interaction
None
S:U Scope
Unchanged
C:L Confidentiality
Low
I:N Integrity
None
A:N Availability
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

  1. Affected≤ 1.3.4
  2. Patched in1.3.5

Update to 1.3.5 or newer.

You are affected if you run ≤ 1.3.4. Version 1.3.5 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

  1. Update to version 1.3.5, or a newer patched version
  2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  3. Watch Stop User Enumeration to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence.

The Stop User Enumeration plugin for WordPress is vulnerable to Username Enumeration Bypasses in versions up to, and including, 1.3.4. This makes it possible for unauthenticated attackers to enumerate lists of valid users that can be used for future attacks.

Exploits & references

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

More in Stop User Enumeration

All 8
More vulnerabilities in Stop User Enumeration
SeverityVulnerabilityCVEPublished
Medium5.3Protection Mechanism Bypass
≤1.7.2Update to 1.7.3
CVE-2025-4302
Medium6.1Reflected Cross-Site Scripting via fs_request_get
≤1.9.2No patch available
CVE-2023-33999
High8.8Missing Authorization to Arbitrary Options Update
<3.1.7Update to 3.1.7
—
Medium5.3User Enumeration
<1.3.9Update to 1.3.9
CVE-2017-1000226
Medium6.1Cross-Site Scripting
<1.3.8Update to 1.3.8
CVE-2017-18536

Same weakness (Information Exposure)

All Information Exposure
Other Information Exposure vulnerabilities
SeverityVulnerabilityCVEPublished
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
CVE-2026-120688
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
CVE-2026-125055
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
CVE-2026-119077
Medium5.3Unauthenticated Sensitive Information Exposure in 'search' Parameter
Customer Reviews for WooCommerce≤5.127.0Update to 5.128.0
CVE-2026-121518

Timeline

  1. CVE published

    Severity medium, CVSS 5.3

  2. Record last updated

Sources & licenses

Vulnerability data
Wordfence Intelligence. [object Object] Licensed under the CC BY-SA 4.0.
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.

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