CVE-2025-31893

6.5 MEDIUM

📋 TL;DR

This stored cross-site scripting (XSS) vulnerability in the Botnet Attack Blocker WordPress plugin allows attackers to inject malicious scripts into web pages. When exploited, these scripts execute in victims' browsers, potentially stealing session cookies or performing unauthorized actions. All WordPress sites using Botnet Attack Blocker versions up to 2.0.0 are affected.

💻 Affected Systems

Products:
  • Botnet Attack Blocker WordPress Plugin
Versions: n/a through 2.0.0
Operating Systems: Any OS running WordPress
Default Config Vulnerable: ⚠️ Yes
Notes: All WordPress installations using vulnerable plugin versions are affected regardless of configuration.

⚠️ Manual Verification Required

This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.

Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).

🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.

Recommended Actions:
  1. Review the CVE details at NVD
  2. Check vendor security advisories for your specific version
  3. Test if the vulnerability is exploitable in your environment
  4. Consider updating to the latest version as a precaution

⚠️ Risk & Real-World Impact

🔴

Worst Case

Attackers could steal administrator session cookies, take over WordPress sites, install backdoors, deface websites, or redirect visitors to malicious sites.

🟠

Likely Case

Attackers inject malicious JavaScript to steal user session cookies, potentially compromising user accounts and performing actions on their behalf.

🟢

If Mitigated

With proper input validation and output encoding, malicious scripts would be neutralized before reaching users' browsers.

🌐 Internet-Facing: HIGH
🏢 Internal Only: MEDIUM

🎯 Exploit Status

Public PoC: ✅ No
Weaponized: LIKELY
Unauthenticated Exploit: ✅ No
Complexity: LOW

Stored XSS vulnerabilities are commonly exploited in the wild, though specific exploit details for this CVE aren't publicly documented.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: 2.0.1 or later

Vendor Advisory: https://patchstack.com/database/wordpress/plugin/botnet-attack-blocker/vulnerability/wordpress-botnet-attack-blocker-plugin-2-0-0-stored-cross-site-scripting-xss-vulnerability?_s_id=cve

Restart Required: No

Instructions:

1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find Botnet Attack Blocker. 4. Click 'Update Now' if update available. 5. Alternatively, download latest version from WordPress repository and replace plugin files.

🔧 Temporary Workarounds

Disable Plugin

all

Temporarily disable the vulnerable plugin until patched

wp plugin deactivate botnet-attack-blocker

Content Security Policy

all

Implement CSP headers to restrict script execution

Add to .htaccess: Header set Content-Security-Policy "default-src 'self'; script-src 'self'"
Add to nginx config: add_header Content-Security-Policy "default-src 'self'; script-src 'self'";

🧯 If You Can't Patch

  • Remove Botnet Attack Blocker plugin entirely and use alternative security plugins
  • Implement web application firewall (WAF) rules to block XSS payloads

🔍 How to Verify

Check if Vulnerable:

Check WordPress admin → Plugins → Installed Plugins for Botnet Attack Blocker version

Check Version:

wp plugin get botnet-attack-blocker --field=version

Verify Fix Applied:

Verify plugin version is 2.0.1 or higher in WordPress admin panel

📡 Detection & Monitoring

Log Indicators:

  • Unusual POST requests to plugin endpoints
  • Suspicious JavaScript in database entries
  • Multiple failed XSS attempts in web server logs

Network Indicators:

  • Malicious script tags in HTTP requests
  • Suspicious characters like <script> in URL parameters

SIEM Query:

source="web_server.log" AND ("botnet-attack-blocker" OR "<script>")

🔗 References

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