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Sinatra Cross-site Scripting vulnerability

Moderate severity GitHub Reviewed Published Jun 5, 2018 to the GitHub Advisory Database • Updated Nov 4, 2023

Package

bundler sinatra (RubyGems)

Affected versions

>= 2.0.0, < 2.0.2

Patched versions

2.0.2

Description

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

References

Published by the National Vulnerability Database May 31, 2018
Published to the GitHub Advisory Database Jun 5, 2018
Reviewed Jun 16, 2020
Last updated Nov 4, 2023

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS score

0.111%
(46th percentile)

Weaknesses

CVE ID

CVE-2018-11627

GHSA ID

GHSA-mq35-wqvf-r23c

Source code

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