What’s Vulnerable › Vulnerabilities

CVE-2021-28963

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-03-22 · updated 2026-06-17
• Weakness: CWE-74

Description

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

Affected products

• Debian Linux: 10.0
• Shibboleth Service Provider: before 3.2.1 — fixed in 3.2.1

How to fix

Upgrade to a fixed version: Shibboleth Service Provider 3.2.1. Check the vendor advisory for mitigations.

References

• https://bugs.debian.org/985405
• https://git.shibboleth.net/view/?p=cpp-sp.git%3Ba=commit%3Bh=d1dbebfadc1bdb824fea63843c4c38fa69e54379
• https://issues.shibboleth.net/jira/browse/SSPCPP-922
• https://shibboleth.net/community/advisories/secadv_20210317.txt
• https://www.debian.org/security/2021/dsa-4872
• https://bugs.debian.org/985405
• https://git.shibboleth.net/view/?p=cpp-sp.git%3Ba=commit%3Bh=d1dbebfadc1bdb824fea63843c4c38fa69e54379
• https://issues.shibboleth.net/jira/browse/SSPCPP-922
• https://shibboleth.net/community/advisories/secadv_20210317.txt
• https://www.debian.org/security/2021/dsa-4872

Get alerted when CVE-2021-28963 or the next vulnerability affects your stack