CVE-2024-45457
📋 TL;DR
This stored XSS vulnerability in the Spiffy Calendar WordPress plugin allows attackers to inject malicious scripts into web pages that are then executed when other users view those pages. All WordPress sites using Spiffy Calendar versions up to 4.9.13 are affected. Attackers can steal session cookies, redirect users, or perform actions on their behalf.
💻 Affected Systems
- Spiffy Calendar WordPress Plugin
📦 What is this software?
Spiffy Calendar by Spiffyplugins
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal administrator credentials, take over the WordPress site, install backdoors, or redirect all visitors to malicious sites.
Likely Case
Attackers inject malicious scripts to steal user session cookies, potentially compromising user accounts and performing unauthorized actions.
If Mitigated
With proper input validation and output encoding, malicious scripts would be neutralized before execution, preventing exploitation.
🎯 Exploit Status
XSS vulnerabilities typically have low exploitation complexity once the injection point is identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.9.14 or later
Vendor Advisory: https://patchstack.com/database/vulnerability/spiffy-calendar/wordpress-spiffy-calendar-plugin-4-9-13-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 Spiffy Calendar and click 'Update Now'. 4. Verify version is 4.9.14 or higher.
🔧 Temporary Workarounds
Disable Spiffy Calendar Plugin
allTemporarily disable the vulnerable plugin until patched
wp plugin deactivate spiffy-calendar
Implement WAF Rules
allAdd XSS protection rules to web application firewall
🧯 If You Can't Patch
- Disable the Spiffy Calendar plugin immediately
- Implement Content Security Policy headers to restrict script execution
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Spiffy Calendar versionCheck Version:
wp plugin get spiffy-calendar --field=versionVerify Fix Applied:
Verify Spiffy Calendar version is 4.9.14 or higher in WordPress admin📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to calendar endpoints
- Script tags in calendar-related form submissions
Network Indicators:
- Malicious script payloads in HTTP requests to calendar endpoints
SIEM Query:
source="web_logs" AND (uri_path="/wp-admin/admin-ajax.php" OR uri_path LIKE "%/spiffy-calendar/%") AND (http_method="POST" OR http_method="PUT") AND (request_body LIKE "%<script>%" OR request_body LIKE "%javascript:%")