CVE-2023-5538
📋 TL;DR
The MpOperationLogs WordPress plugin up to version 1.0.1 contains a stored cross-site scripting (XSS) vulnerability that allows unauthenticated attackers to inject malicious scripts via IP request headers. These scripts execute whenever users view pages containing the injected content, potentially compromising their browsers. All WordPress sites using vulnerable versions of this plugin are affected.
💻 Affected Systems
- MpOperationLogs WordPress Plugin
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal administrator session cookies, perform actions as authenticated users, redirect visitors to malicious sites, or install malware on user systems.
Likely Case
Attackers will typically inject scripts to steal session cookies or credentials, potentially gaining administrative access to the WordPress site.
If Mitigated
With proper input validation and output escaping, the vulnerability would be prevented, and even if exploited, browser security features might limit script execution.
🎯 Exploit Status
The vulnerability is simple to exploit by sending crafted HTTP requests with malicious scripts in IP headers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.0.2 or later
Vendor Advisory: https://plugins.trac.wordpress.org/browser/mpoperationlogs/
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find MpOperationLogs and check if update is available. 4. Click 'Update Now' to install version 1.0.2 or later. 5. Verify the plugin is updated.
🔧 Temporary Workarounds
Disable Plugin
allTemporarily disable the vulnerable plugin until patched.
wp plugin deactivate mpoperationlogs
Web Application Firewall (WAF)
allConfigure WAF to block requests containing script tags in IP headers.
🧯 If You Can't Patch
- Remove the MpOperationLogs plugin entirely from the WordPress installation.
- Implement strict Content Security Policy (CSP) headers to mitigate XSS impact.
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > MpOperationLogs version. If version is 1.0.1 or lower, the site is vulnerable.Check Version:
wp plugin get mpoperationlogs --field=versionVerify Fix Applied:
After updating, verify the plugin version shows 1.0.2 or higher in WordPress admin.📡 Detection & Monitoring
Log Indicators:
- Unusual IP headers containing script tags in web server logs
- Multiple requests with similar malicious payloads
Network Indicators:
- HTTP requests with script tags in X-Forwarded-For or similar IP headers
SIEM Query:
source="web_logs" AND (http_header="*<script>*" OR http_header="*javascript:*")🔗 References
- https://github.com/juweihuitao/MpOperationLogs/
- https://plugins.trac.wordpress.org/browser/mpoperationlogs/trunk/common.php#L10
- https://plugins.trac.wordpress.org/browser/mpoperationlogs/trunk/template/ipslist_td.php
- https://www.wordfence.com/threat-intel/vulnerabilities/id/bc5f1b00-acee-4dc8-acd7-2d3f3493f253?source=cve
- https://github.com/juweihuitao/MpOperationLogs/
- https://plugins.trac.wordpress.org/browser/mpoperationlogs/trunk/common.php#L10
- https://plugins.trac.wordpress.org/browser/mpoperationlogs/trunk/template/ipslist_td.php
- https://www.wordfence.com/threat-intel/vulnerabilities/id/bc5f1b00-acee-4dc8-acd7-2d3f3493f253?source=cve
