CVE-2021-28963: Debian Linux

Medium severity, CVSS 5.3. EPSS: 1.3% chance of exploitation in the next 30 days.

Shibboleth Service Provider before 3.2.1 allows content injection because template generation uses attacker-controlled parameters.

Affected products

• Debian Debian Linux: version 10.0 only
• Shibboleth Service Provider: before 3.2.1 (fixed in 3.2.1)

Published 2021-03-22. Last modified 2026-06-17.