The User Activity Log plugin for WordPress is vulnerable to IP Address Spoofing in versions up to and including 1.6.6. This is due to insufficient restrictions on where the IP Address information is being retrieved for request logging. Attackers can supplied the X-Forwarded-For header with with a different IP Address that will be logged.
CVE-2023-4279 is a medium severity with CVSS 5.3 Vulnerability issue affecting the Plugin User Activity Log. It affects Versions up to 1.6.6 and is fixed in 1.6.7.
Use the related hub and response guides to connect this CVE-2023-4279 report with patch validation, scanner checks, and site hardening work.
Open the grouped hub for related CVEs, affected ranges, severity mix, and patch coverage.
Check access, XML-RPC exposure, backup readiness, and monitoring after patching.
Use containment, evidence capture, remediation, and validation steps when exploit risk is high.
CVE-2023-4279 is tracked for the Plugin User Activity Log as medium severity with CVSS 5.3. The affected range is Versions up to 1.6.6. Update User Activity Log to 1.6.7 or newer where that version is compatible with the site.
Search engines and operators need more than a title. This page exposes the identifier, affected range, patch evidence, and source coverage that make the vulnerability actionable.
This report has a CVE identifier, which makes it suitable for focused search and vulnerability triage workflows.
Affected version data gives operators a concrete comparison point against installed WordPress software.
A fixed version is present, so the page can answer update and remediation intent directly.
External references are available for source validation, advisory review, and incident notes.
Use these checks when converting this record into a patch ticket, incident note, or risk acceptance decision.
Inventory the installed Plugin package and compare its version with Versions up to 1.6.6.
Confirm User Activity Log is updated to 1.6.7 or newer.
Review references and CVSS vector details for exploitability, authentication requirements, and exposure path.
After patching, re-run vulnerability monitoring and keep the related plugin or theme hub under review for follow-up CVEs.
| Software Type | Plugin |
|---|---|
| Software Slug |
user-activity-log
View on wordpress.org
|
| CVE | CVE-2023-4279 |
| Patched Versions |
1.6.7
|
| Affected Versions |
Versions up to 1.6.6
|
These internal links group the same WordPress plugin by CVE, issue type, severity, and patch status so operators and search engines can connect the full vulnerability cluster.
User Activity Log <= 1.9 - Authenticated (Administrator+) SQL Injection
User Activity Log <= 2.2 - Unauthenticated Limited Options Update via Failed Login
User Activity Log <= 1.6.5 - Unauthenticated Data Export to Sensitive Information Disclosure
User Activity Log <= 1.6.4 - Unauthenticated SQL Injection
User Activity Log <= 1.6.2 - Authenticated (Administrator+) SQL Injection
User Activity Log <= 1.6.2 - Authenticated(Administrator+) SQL Injection via txtsearch
User Activity Log <= 1.6.2 - Unauthenticated SQL Injection via username
User Activity Log <= 1.4.6 - Reflected Cross-Site Scripting
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