CVE-2020-13481
📋 TL;DR
This CVE describes a cross-site scripting (XSS) vulnerability in certain Lexmark printer products that allows attackers to inject malicious scripts. When exploited, it can lead to session credential theft and exposure of sensitive information. Organizations using affected Lexmark printers through May 25, 2020 are vulnerable.
💻 Affected Systems
- Lexmark printers with web management interfaces
⚠️ 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 steal administrator credentials, gain full control of printer management interfaces, access network credentials stored in printer configurations, and pivot to internal network systems.
Likely Case
Attackers steal session cookies or credentials from users accessing the printer web interface, potentially gaining unauthorized access to printer management functions.
If Mitigated
With proper network segmentation and access controls, impact is limited to printer management interface compromise without lateral movement.
🎯 Exploit Status
XSS vulnerabilities typically require user interaction (visiting malicious link) but can be combined with social engineering.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Firmware updates released after 2020-05-25
Vendor Advisory: http://support.lexmark.com/alerts/
Restart Required: Yes
Instructions:
1. Visit Lexmark support portal. 2. Identify your printer model. 3. Download latest firmware. 4. Upload firmware via printer web interface. 5. Reboot printer.
🔧 Temporary Workarounds
Network Segmentation
allIsolate printers to separate VLAN without internet access
Access Control
allRestrict printer web interface access to authorized IPs only
🧯 If You Can't Patch
- Disable printer web interface if not required for operations
- Implement strict Content Security Policy headers if supported
🔍 How to Verify
Check if Vulnerable:
Check printer firmware version date; if before 2020-05-25, likely vulnerableCheck Version:
Check via printer web interface: Settings > Device > About or similar menuVerify Fix Applied:
Verify firmware version is newer than 2020-05-25 release date📡 Detection & Monitoring
Log Indicators:
- Unusual access to printer web interface
- Multiple failed login attempts
Network Indicators:
- HTTP requests with suspicious script tags to printer IPs
- Unexpected outbound connections from printers
SIEM Query:
source="printer_logs" AND (url="*<script>*" OR user_agent="*malicious*")