Sinatra before 2.0.2 has XSS via the 400 Bad Request page that occurs upon a params parser exception.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2018-11627 from the MITRE CVE dictionary dictionary and NIST NVD.
NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.
| CVSS3 Base Score | 6.1 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| Attack Vector | Network |
| Attack Complexity | Low |
| Privileges Required | None |
| User Interaction | Required |
| Scope | Changed |
| Confidentiality | Low |
| Integrity Impact | Low |
| Availability Impact | None |
| Platform | Package | State |
|---|---|---|
| Red Hat Subscription Asset Manager 1 | rubygem-sinatra | Not affected |
| Red Hat Software Collections for Red Hat Enterprise Linux | rh-ror50-rubygem-sinatra | Not affected |
| Red Hat Software Collections for Red Hat Enterprise Linux | rh-ror42-rubygem-sinatra | Not affected |
| Red Hat Satellite 6 | rubygem-sinatra | Not affected |
| Red Hat OpenStack Platform Operational Tools 9 | rubygem-sinatra | Not affected |
| Red Hat OpenStack Platform 12.0 Operational Tools for RHEL 7 | rubygem-sinatra | Not affected |
| Red Hat OpenStack Platform 10.0 Operational Tools for RHEL 7 | rubygem-sinatra | Not affected |
| Red Hat Gluster Storage 3 | rubygem-sinatra | Not affected |
| Red Hat Gluster Storage 3 | pcs | Not affected |
| Red Hat Enterprise MRG 2 | rubygem-sinatra | Not affected |
| Red Hat Enterprise Linux OpenStack Platform 8.0 Operational Tools for RHEL 7 | rubygem-sinatra | Not affected |
| Red Hat Enterprise Linux OpenStack Platform 7.0 Operational Tools for RHEL 7 | rubygem-sinatra | Not affected |
| Red Hat Enterprise Linux 7 | pcs | Not affected |
| Red Hat Enterprise Linux 6 | pcs | Not affected |
| Red Hat Ceph Storage 1.3 | rubygem-sinatra | Not affected |
Vulmon