CVE-2020-28502: Xmlhttprequest Project Xmlhttprequest

High severity, CVSS 8.1. EPSS: 4.6% chance of exploitation in the next 30 days.

This affects the package xmlhttprequest before 1.7.0; all versions of package xmlhttprequest-ssl. Provided requests are sent synchronously (async=False on xhr.open), malicious user input flowing into xhr.send could result in arbitrary code being injected and run.

Affected products

• Xmlhttprequest Project Xmlhttprequest: before 1.7.0 (fixed in 1.7.0)

Published 2021-03-05. Last modified 2026-06-17.