CVE-2025-28941
📋 TL;DR
A Cross-Site Request Forgery (CSRF) vulnerability in the ohtan Spam Byebye WordPress plugin allows attackers to trick authenticated administrators into performing unintended actions. This affects WordPress sites using Spam Byebye plugin versions up to 2.2.4. Attackers could modify plugin settings or perform other administrative actions without the victim's knowledge.
💻 Affected Systems
- ohtan Spam Byebye 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
An attacker could change plugin settings to disable spam protection, modify site functionality, or potentially chain with other vulnerabilities for further compromise.
Likely Case
Attackers would typically modify spam filter settings to allow malicious content through or disable protection mechanisms.
If Mitigated
With proper CSRF protections and user awareness, the risk is limited to actions within the plugin's administrative capabilities.
🎯 Exploit Status
CSRF attacks are well-understood and relatively easy to implement, requiring only a crafted malicious page.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.2.5 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find Spam Byebye and click 'Update Now'. 4. Verify update to version 2.2.5 or later.
🔧 Temporary Workarounds
Implement CSRF Tokens Manually
allAdd CSRF protection to plugin forms if you cannot update immediately
Requires custom PHP development to add nonce verification
Restrict Admin Access
allLimit administrative access to trusted networks only
🧯 If You Can't Patch
- Disable the Spam Byebye plugin and use alternative spam protection
- Implement network segmentation to restrict admin panel access to trusted IPs only
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Installed Plugins for Spam Byebye versionCheck Version:
wp plugin list --name=spam-byebye --field=version (if WP-CLI installed)Verify Fix Applied:
Verify Spam Byebye version is 2.2.5 or higher in WordPress plugins list📡 Detection & Monitoring
Log Indicators:
- Unexpected changes to Spam Byebye settings in WordPress logs
- Multiple failed CSRF token validations
Network Indicators:
- POST requests to wp-admin/admin.php without proper referrer headers
SIEM Query:
source="wordpress" AND (uri_path="/wp-admin/admin.php" AND plugin="spam-byebye") AND NOT referrer CONTAINS own_domain