CVE-2025-63020
📋 TL;DR
This stored XSS vulnerability in the Postie WordPress plugin allows attackers to inject malicious scripts into web pages that persist and execute when other users view them. It affects all WordPress sites using Postie plugin versions up to 1.9.73. Attackers can steal session cookies, redirect users, or perform actions on their behalf.
💻 Affected Systems
- WordPress Postie plugin
⚠️ 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.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Attacker gains administrative access to WordPress site, installs backdoors, steals sensitive data, or completely compromises the website.
Likely Case
Attacker steals session cookies of logged-in users, performs unauthorized actions, or redirects visitors to malicious sites.
If Mitigated
Limited impact with proper input validation and output encoding in place, though stored XSS remains dangerous.
🎯 Exploit Status
XSS vulnerabilities are commonly weaponized. Exploitation requires ability to submit content through Postie's email-to-post functionality.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.9.74 or later
Vendor Advisory: https://patchstack.com/database/wordpress/plugin/postie/vulnerability/wordpress-postie-plugin-1-9-73-cross-site-scripting-xss-vulnerability?_s_id=cve
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Go to Plugins → Installed Plugins. 3. Find Postie plugin. 4. Click 'Update Now' if available. 5. Alternatively, download latest version from WordPress repository and replace plugin files.
🔧 Temporary Workarounds
Disable Postie plugin
allTemporarily disable the vulnerable plugin until patched
wp plugin deactivate postie
Implement WAF rules
allAdd web application firewall rules to block XSS payloads
🧯 If You Can't Patch
- Restrict email sources that can post via Postie to trusted senders only
- Implement Content Security Policy (CSP) headers to mitigate XSS impact
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Installed Plugins → Postie versionCheck Version:
wp plugin get postie --field=versionVerify Fix Applied:
Verify Postie plugin version is 1.9.74 or higher📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to Postie endpoints
- Suspicious script tags in post content
Network Indicators:
- Malicious script payloads in HTTP requests
- Unexpected redirects from Postie-generated pages
SIEM Query:
source="wordpress.log" AND "postie" AND ("script" OR "javascript" OR "onload" OR "onerror")