CVE-2025-46528
📋 TL;DR
A Cross-Site Request Forgery (CSRF) vulnerability in the Steve Availability Calendar WordPress plugin allows attackers to inject malicious scripts that execute when other users view affected pages. This affects WordPress sites running the Availability Calendar plugin version 0.2.4 and earlier. The CSRF leads to stored cross-site scripting (XSS), potentially compromising user sessions and site integrity.
💻 Affected Systems
- Steve Availability Calendar WordPress 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
Attackers could inject malicious JavaScript that steals administrator credentials, takes over WordPress sites, defaces websites, or redirects visitors to malicious sites when administrators view compromised calendar pages.
Likely Case
Attackers trick authenticated users into performing unintended actions via forged requests, leading to stored XSS payloads that execute in victims' browsers, potentially stealing session cookies or performing actions on behalf of users.
If Mitigated
With proper CSRF tokens and input validation, the vulnerability would be prevented, maintaining normal plugin functionality without security risks.
🎯 Exploit Status
Exploitation requires tricking authenticated users into clicking malicious links or visiting compromised pages. CSRF vulnerabilities are commonly exploited in real-world attacks.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 0.2.5 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find 'Availability Calendar' and check if update is available. 4. Click 'Update Now' to install version 0.2.5 or later. 5. Verify the plugin is updated to a patched version.
🔧 Temporary Workarounds
Disable Plugin
allTemporarily disable the vulnerable plugin until patched
wp plugin deactivate availability-calendar
Implement CSRF Protection
allAdd custom CSRF tokens to plugin forms if source code access is available
🧯 If You Can't Patch
- Remove the Availability Calendar plugin completely from production systems
- Implement web application firewall (WAF) rules to block suspicious calendar-related requests
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Installed Plugins for 'Availability Calendar' version 0.2.4 or earlierCheck Version:
wp plugin get availability-calendar --field=versionVerify Fix Applied:
Verify plugin version is 0.2.5 or later in WordPress admin panel📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to calendar-related endpoints
- Multiple failed authentication attempts following calendar page views
- JavaScript injection patterns in form submissions
Network Indicators:
- Unexpected outbound connections from WordPress site after calendar interactions
- Suspicious referrer headers in calendar-related requests
SIEM Query:
source="wordpress.log" AND (uri_path="/wp-admin/admin-ajax.php" AND parameters CONTAINS "availability_calendar")