PT-2021-23930 · Unknown · @Backstage/Plugin-Scaffolder-Backend

Rugvip · Published 2021-11-29 · Updated 2025-01-03 · CVE-2021-43783

Positive Technologies (AI Summary)

CVSS v3.1

8.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions: @backstage/plugin-scaffolder-backend versions prior to 0.15.14

Description: A malicious actor with write access to a registered scaffolder template can manipulate the template to write files to arbitrary paths on the scaffolder-backend host instance. This issue can also be exploited through user input when executing a template, although this method does not allow control of the injected file's contents unless the template is specifically crafted to provide such control.

Recommendations: For versions prior to 0.15.14, update to version 0.15.14 to resolve the issue. As a temporary workaround, consider restricting access and requiring reviews when registering or modifying scaffolder templates to mitigate the attack.

Fix

Path traversal

Weakness Enumeration

CWE-22

Related Identifiers

CVE-2021-43783

GHSA-MG3M-F475-28HV

Affected Products

@Backstage/Plugin-Scaffolder-Backend

References · 8

• https://github.com/backstage/backstage/commit/f9352ab606367cd9efc6ff048915c70ed3013b7f · Patch
• https://osv.dev/vulnerability/GHSA-mg3m-f475-28hv · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-43783 · Security Note
• https://osv.dev/vulnerability/CVE-2021-43783 · Vendor Advisory
• https://github.com/backstage/backstage · Note
• https://github.com/backstage/backstage/security/advisories/GHSA-mg3m-f475-28hv · Note
• https://t.me/cvenotify/106148 · Telegram Post
• https://t.me/cibsecurity/33053 · Telegram Post