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Path traversal and code execution via prototype vulnerability

Critical severity GitHub Reviewed Published Jul 24, 2023 in NodeBB/NodeBB • Updated Nov 9, 2023

Package

npm nodebb (npm)

Affected versions

>= 2.5.0, < 2.8.7

Patched versions

2.8.7

Description

Impact

Due to the use of the object destructuring assignment syntax in the user export code path, combined with a path traversal vulnerability, a specially crafted payload could invoke the user export logic to arbitrarily execute javascript files on the local disk.

Patches

Patched in v2.8.7

Workarounds

Site maintainers can cherry pick ec58700f6dff8e5b4af1544f6205ec362b593092 into their codebase to patch the exploit.

References

@julianlam julianlam published to NodeBB/NodeBB Jul 24, 2023
Published by the National Vulnerability Database Jul 24, 2023
Published to the GitHub Advisory Database Jul 25, 2023
Reviewed Jul 25, 2023
Last updated Nov 9, 2023

Severity

Critical

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
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

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:N/S:C/C:H/I:H/A:H

EPSS score

0.117%
(47th percentile)

Weaknesses

CVE ID

CVE-2023-26045

GHSA ID

GHSA-vh2g-6c4x-5hmp

Source code

Credits

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