CVE-2020-28463: Fedoraproject Fedora

Medium severity, CVSS 6.5. EPSS: 1.3% chance of exploitation in the next 30 days.

All versions of package reportlab are vulnerable to Server-side Request Forgery (SSRF) via img tags. In order to reduce risk, use trustedSchemes & trustedHosts (see in Reportlab's documentation) Steps to reproduce by Karan Bamal: 1. Download and install the latest package of reportlab 2. Go to demos -> odyssey -> dodyssey 3. In the text file odyssey.txt that needs to be converted to pdf inject <img src="http://127.0.0.1:5000" valign="top"/> 4. Create a nc listener nc -lp 5000 5. Run python3 dodyssey.py 6. You will get a hit on your nc showing we have successfully proceded to send a server side request 7. dodyssey.py will show error since there is no img file on the url, but we are able to do SSRF

Affected products

• Fedoraproject Fedora: version 34 only; version 35 only
• Reportlab Reportlab: any version

Published 2021-02-18. Last modified 2026-06-17.