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Haml vulnerable to cross-site scripting

Moderate severity GitHub Reviewed Published Oct 21, 2019 to the GitHub Advisory Database • Updated Aug 25, 2023

Package

bundler haml (RubyGems)

Affected versions

< 5.0.0

Patched versions

5.0.0

Description

In haml versions prior to version 5.0.0.beta.2, when using user input to perform tasks on the server, characters like < > " ' must be escaped properly. In this case, the ' character was missed. An attacker can manipulate the input to introduce additional attributes, potentially executing code.

References

Published by the National Vulnerability Database Oct 15, 2019
Reviewed Oct 16, 2019
Published to the GitHub Advisory Database Oct 21, 2019
Last updated Aug 25, 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:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS score

0.239%
(63rd percentile)

Weaknesses

CVE ID

CVE-2017-1002201

GHSA ID

GHSA-r53w-g4xm-3gc6

Source code

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