CVE Vulnerability

CVE-2021-43783

@backstage/plugin-scaffolder-backend is the backend for the default Backstage software templates. In affected versions a malicious actor with write access to a registered scaffolder template is able to manipulate the template in a way that writes files to arbitrary paths on the scaffolder-backend host instance. This vulnerability can in some situation also be exploited through user input when executing a template, meaning you do not need write access to the templates. This method will not allow the attacker to control the contents of the injected file however, unless the template is also crafted in a specific way that gives control of the file contents. This vulnerability is fixed in version `0.15.14` of the `@backstage/plugin-scaffolder-backend`. This attack is mitigated by restricting access and requiring reviews when registering or modifying scaffolder templates.

5.5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 8 / Impact : 4.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact PARTIAL

Scope

8.5 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 3.1 / Impact : 4.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact LOW

Scope CHANGED

References
Link Resource
https://github.com/backstage/backstage/security/advisories/GHSA-mg3m-f475-28hv Third Party Advisory
https://github.com/backstage/backstage/commit/f9352ab606367cd9efc6ff048915c70ed3013b7f Patch Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:backstage:backstage:*:*:*:*:*:*:*:*
Information

Published : 2021-11-29 08:15

Updated : 2021-12-01 07:41

NVD link : CVE-2021-43783

Mitre link : CVE-2021-43783

Products Affected
No products.
CWE
CWE-22