Skip to content

Injection/XSS in Redcarpet

Moderate severity GitHub Reviewed Published Jan 11, 2021 to the GitHub Advisory Database • Updated May 9, 2023

Package

bundler redcarpet (RubyGems)

Affected versions

< 3.5.1

Patched versions

3.5.1

Description

Redcarpet is a Ruby library for Markdown processing. In Redcarpet before version 3.5.1, there is an injection vulnerability which can enable a cross-site scripting attack. In affected versions no HTML escaping was being performed when processing quotes. This applies even when the :escape_html option was being used. This is fixed in version 3.5.1 by the referenced commit.

References

Reviewed Jan 11, 2021
Published to the GitHub Advisory Database Jan 11, 2021
Published by the National Vulnerability Database Jan 11, 2021
Last updated May 9, 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
Low
User interaction
Required
Scope
Changed
Confidentiality
None
Integrity
High
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:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:N

EPSS score

0.077%
(35th percentile)

Weaknesses

CVE ID

CVE-2020-26298

GHSA ID

GHSA-q3wr-qw3g-3p4h

Source code

Loading Checking history
See something to contribute? Suggest improvements for this vulnerability.