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Ghost vulnerable to arbitrary file read via symlinks in content import

Moderate severity GitHub Reviewed Published Aug 15, 2023 in TryGhost/Ghost • Updated Nov 8, 2023

Package

npm ghost (npm)

Affected versions

< 5.59.1

Patched versions

5.59.1

Description

Impact

A vulnerability in Ghost allows authenticated users to upload files which are symlinks. This can be exploited to perform an arbitrary file read of any file on the operating system.

Site administrators can check for exploitation of this issue by looking for unknown symlinks within Ghost's content/ folder

Vulnerable versions

This security vulnerability is present in Ghost ≤ v5.59.0.

Patches

v5.59.1 contains a fix for this issue.

For more information

If you have any questions or comments about this advisory:

References

@daniellockyer daniellockyer published to TryGhost/Ghost Aug 15, 2023
Published by the National Vulnerability Database Aug 15, 2023
Published to the GitHub Advisory Database Aug 15, 2023
Reviewed Aug 15, 2023
Last updated Nov 8, 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
High
User interaction
None
Scope
Unchanged
Confidentiality
High
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:L/PR:H/UI:N/S:U/C:H/I:N/A:N

EPSS score

0.067%
(31st percentile)

Weaknesses

CVE ID

CVE-2023-40028

GHSA ID

GHSA-9c9v-w225-v5rg

Source code

Credits

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