What’s Vulnerable › Vulnerabilities

CVE-2018-11627

• Severity: medium (CVSS 6.1 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2018-05-31 · updated 2026-06-17
• Weakness: CWE-79

Description

Sinatra before 2.0.2 has XSS via the 400 Bad Request page that occurs upon a params parser exception.

Affected products

• CloudForms: 4.6, 4.7
• sinatra: before 2.0.2 — fixed in 2.0.2

How to fix

Upgrade to a fixed version: sinatra 2.0.2. Check the vendor advisory for mitigations.

References

• https://access.redhat.com/errata/RHSA-2019:0212
• https://access.redhat.com/errata/RHSA-2019:0315
• https://github.com/sinatra/sinatra/commit/12786867d6faaceaec62c7c2cb5b0e2dc074d71a
• https://github.com/sinatra/sinatra/issues/1428
• https://access.redhat.com/errata/RHSA-2019:0212
• https://access.redhat.com/errata/RHSA-2019:0315
• https://github.com/sinatra/sinatra/commit/12786867d6faaceaec62c7c2cb5b0e2dc074d71a
• https://github.com/sinatra/sinatra/issues/1428

Get alerted when CVE-2018-11627 or the next vulnerability affects your stack