# CVE-2021-28963: libapache2-mod-shib: Shibboleth Service Provider before 3.2.1 allows content injection because template generation uses attacker-controlle...

CVE-2021-28963 is fixed in 8 products on 1 platform, first by libapache2-mod-shib 3.0.4+dfsg1-1ubuntu0.1, released March 22, 2021. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-28963
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0131
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 22, 2021

## Description

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

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libapache2-mod-shib Ubuntu 20.04 LTS (focal) | 3.0.4+dfsg1-1ubuntu0.1 | [libapache2-mod-shib 3.0.4+dfsg1-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libapache2-mod-shib-3.0.4-dfsg1-1ubuntu0.1.md) | Mar 22, 2021 |
| Linux | libapache2-mod-shib2 Ubuntu 20.04 LTS (focal) | 3.0.4+dfsg1-1ubuntu0.1 | [libapache2-mod-shib2 3.0.4+dfsg1-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libapache2-mod-shib2-3.0.4-dfsg1-1ubuntu0.1.md) | Mar 22, 2021 |
| Linux | libshibsp-plugins Ubuntu 20.04 LTS (focal) | 3.0.4+dfsg1-1ubuntu0.1 | [libshibsp-plugins 3.0.4+dfsg1-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libshibsp-plugins-3.0.4-dfsg1-1ubuntu0.1.md) | Mar 22, 2021 |
| Linux | libshibsp8 Ubuntu 20.04 LTS (focal) | 3.0.4+dfsg1-1ubuntu0.1 | [libshibsp8 3.0.4+dfsg1-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libshibsp8-3.0.4-dfsg1-1ubuntu0.1.md) | Mar 22, 2021 |
| Linux | shibboleth-sp-common Ubuntu 20.04 LTS (focal) | 3.0.4+dfsg1-1ubuntu0.1 | [shibboleth-sp-common 3.0.4+dfsg1-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-shibboleth-sp-common-3.0.4-dfsg1-1ubuntu0.1.md) | Mar 22, 2021 |
| Linux | shibboleth-sp-utils Ubuntu 20.04 LTS (focal) | 3.0.4+dfsg1-1ubuntu0.1 | [shibboleth-sp-utils 3.0.4+dfsg1-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-shibboleth-sp-utils-3.0.4-dfsg1-1ubuntu0.1.md) | Mar 22, 2021 |
| Linux | shibboleth-sp2-common Ubuntu 20.04 LTS (focal) | 3.0.4+dfsg1-1ubuntu0.1 | [shibboleth-sp2-common 3.0.4+dfsg1-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-shibboleth-sp2-common-3.0.4-dfsg1-1ubuntu0.1.md) | Mar 22, 2021 |
| Linux | shibboleth-sp2-utils Ubuntu 20.04 LTS (focal) | 3.0.4+dfsg1-1ubuntu0.1 | [shibboleth-sp2-utils 3.0.4+dfsg1-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-shibboleth-sp2-utils-3.0.4-dfsg1-1ubuntu0.1.md) | Mar 22, 2021 |

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Data as of 2026-11-09T13:31:49Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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