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Stored cross site scripting in RSS displayer

Low severity GitHub Reviewed Published Apr 28, 2023 to the GitHub Advisory Database • Updated Nov 7, 2023

Package

composer concrete5/concrete5 (Composer)

Affected versions

< 9.1.0

Patched versions

9.1.0

Description

Concrete CMS (previously concrete5) before 9.1 is vulnerable to stored XSS in RSS Displayer via the href attribute because the link element input was not sanitized.

References

Published by the National Vulnerability Database Apr 28, 2023
Published to the GitHub Advisory Database Apr 28, 2023
Reviewed May 1, 2023
Last updated Nov 7, 2023

Severity

Low

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
High
Privileges required
High
User interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
None
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:H/PR:H/UI:R/S:U/C:L/I:N/A:N

EPSS score

0.065%
(31st percentile)

Weaknesses

CVE ID

CVE-2023-28820

GHSA ID

GHSA-fgxj-g7x3-85cq

Source code

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