SCA: security update for @backstage/plugin-scaffolder-backend (GHSA-mg3m-f475-28hv)

high Tenable Cloud Security Plugin ID 416937

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

- @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. (CVE-2021-43783)

Plugin Details

Severity: High

ID: 416937

Version: Revision 1.6

Type: Local

Family: SCA Checks

Published: 1/23/2025

Updated: 1/27/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3.9

Percentile: 52.21

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.1

Vector: CVSS2#AV:N/AC:L/Au:S/C:N/I:P/A:P

CVSS Score Source: CVE-2021-43783

CVSS v3

Risk Factor: High

Base Score: 8.5

Temporal Score: 7.4

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:L

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 12/1/2021

Vulnerability Publication Date: 11/29/2021

Reference Information

CVE: CVE-2021-43783

cwe: CWE-22

Detections

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