iTechGuides is reader-supported. When you buy through links on our site, we may earn an affiliate commission. As an Amazon Associate I earn from qualifying purchases. Learn more
Start with your web server’s access and error logs. Requests containing traversal-like paths, sensitive file targets, or remote-resource values can indicate attempted local file inclusion (LFI), remote file inclusion (RFI), or directory traversal—but an access-log match shows what a client requested, not that WordPress included the file or that the site was compromised. Correlate it with runtime errors, response details, and file changes before drawing conclusions.
Which logs should you check?
WordPress’s hardening guidance identifies server logs as a place to look for LFI, RFI, and directory-traversal attempts. Begin with the web server’s access and error logs, then check PHP and WordPress records if available. Coverage and retention depend on your hosting and server configuration; a missing entry in one source does not prove the request never happened.
| Log source | What it can show | What it cannot establish alone |
|---|---|---|
| Web server access log | Recorded requests, often including time, requested route and parameters, client address, status code, and response size, depending on the log format. | Whether vulnerable code processed a parameter or successfully included a file. |
| Web server and PHP error logs | Errors or warnings associated with request handling, where captured and retained. | That an apparent request succeeded; an error can also reflect a blocked or invalid attempt. |
| WordPress debug log | Errors, notices, and warnings recorded by WordPress when debug logging was enabled. | A complete request history. It is supplementary evidence, not an access log. |
| File-integrity or host monitoring records | Added or changed files, including potentially suspicious executable files. | Which request caused a change unless the records can be correlated in time and context. |
WordPress notes that logs may identify an IP address, time, and actions, but do not necessarily reveal who logged in. Confirm that your collection covers the relevant site or virtual host and the full incident window; ask your hosting provider for access if the logs are not available in your control panel.
Quick wins for a faster PC:
Scan for outdated or missing drivers - takes under a minuteDriver Scan →Repair Windows errors before they cause bigger problemsFix Now →What suspicious requests look like
OWASP describes LFI as exploiting a vulnerable inclusion procedure to include a file already on the server, and RFI as using such a procedure to include a remote file. A potential clue is a file-selection parameter or path containing traversal-like segments, a sensitive local-file target, or a remote resource value. These patterns are contextual indicators, not a universal signature: routes, parameter names, and server behavior vary by site.
#1 Best Overall
To assess a candidate request, note the timestamp, route, parameter names and values, status code, and response size if logged. Search for repeated requests with altered paths or encodings, then compare the route and parameters with the actual behavior of the site’s WordPress core, installed themes, and plugins. OWASP’s LFI testing guidance and RFI testing guidance explain these vulnerability classes; they do not define a single pattern that proves an attack succeeded on every WordPress site.
How to investigate a suspicious log entry
- Preserve the original records. Copy the relevant access, error, and application logs before changing settings or rotating files. Record the log source, collection window, and timezone. Keep an untouched copy of the raw entries.
- Review the surrounding traffic. Examine nearby entries for the same route, client address, or parameter with varied values. Record status codes and response sizes where the log format includes them. A request can be evidence of an attempt even when it returns an error.
- Correlate errors and application output. Check web-server and PHP error records at the same time. If WordPress debug logging was enabled during the relevant period, inspect
wp-content/debug.logfor related warnings or errors. WordPress explains how to configure this in its debugging documentation. Do not treat the debug log as a record of all incoming requests. - Check for unexpected file changes. Review available file-integrity or host-monitoring records for files added or modified during the same period, paying particular attention to executable files such as PHP. Correlation can strengthen an investigation, but timing alone does not establish which request caused a change.
- Trace the parameter to its handler. Identify which core, theme, or plugin code handles the requested route and consumes the suspicious value. Determine whether that code selects or includes a file, and whether the value is restricted to intended files. If you cannot access the relevant logs or trace the handler, ask your host or an incident-response provider to help.
Why a log match is not proof of compromise
An access log records a request as captured by the server; it does not by itself show that the application accepted the value, reached an inclusion operation, or returned file contents. A matching entry may be an automated scan, a blocked attempt, or a malformed request. More persuasive context comes from examining the request alongside runtime errors, response behavior, the responsible handler, and any unexplained file changes.
Absence of a matching entry is not proof that no attempt occurred. Logging may be incomplete, the relevant virtual host may use a different log, records may have expired, or the value may appear in an escaped or encoded form. Search carefully and preserve the original representation so that normalization does not erase useful detail.
PC Slower Than It Used to Be?
A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11Crashes, No Sound, or Screen Glitches?
Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minuteHandle logs safely and prevent repeat exposure
Request data is untrusted. OWASP’s Logging Cheat Sheet and Log Injection guidance warn that attacker-controlled input can forge or corrupt log entries. Treat suspicious lines as evidence to verify, protect log files from unauthorized access, and maintain copies whose integrity is preserved. When searching encoded or escaped values, work from a copy and retain the raw record for comparison.
Check whether WordPress debug logging was enabled during the incident window. If you enable it for future troubleshooting, ensure that wp-content/debug.log cannot be retrieved publicly; it can contain diagnostic information. Debug logging supplements server records rather than replacing them.
For prevention, fix the code that consumes the value. OWASP recommends constraining file selection—for example, mapping an allowed identifier to permitted files instead of accepting an arbitrary path where feasible. Do not apply a broad server blocking rule without checking how it interacts with your site: WordPress warns that one example rule involving wp-includes may interfere with Multisite behavior. Review the rule against your actual configuration before deployment.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
Free tools Windows power users keep installed
One-click scans. No signup required.
