CVE-2021-28963

MEDIUM 5.3CVE-2021-28963 · Published 22/03/2021 · updated 17/06/2026

In short

CVE-2021-28963 is a MEDIUM (CVSS 5.3) vulnerability affecting service provider (shibboleth).
Chance of exploitation in the next 30 days (EPSS): 1.3%, higher than 70.6% of all vulnerabilities.
Fix: update to 3.2.1 or later.

Package	Affected versions	Patched versions
service provider shibboleth	`< 3.2.1`	`3.2.1`

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

Running one of these products? Scan your site to see whether it exposes a vulnerable version.

Package

Affected versions

Patched versions

< 3.2.1

3.2.1

More vulnerabilities in service provider

See all →