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CVE-2023-35926

8.0 · HIGH

Backstage is an open platform for building developer portals.

Published Jun 22, 2023CWE-94EPSS 1.89%

Overview

CVE-2023-35926 is a high-severity vulnerability. It was published on June 22, 2023 and has a CVSS 3.1 base score of 8.0 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.0, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

Backstage is an open platform for building developer portals. The Backstage scaffolder-backend plugin uses a templating library that requires sandbox, as it by design allows for code injection. The library used for this sandbox so far has been `vm2`, but in light of several past vulnerabilities and existing vulnerabilities that may not have a fix, the plugin has switched to using a different sandbox library. A malicious actor with write access to a registered scaffolder template could manipulate the template in a way that allows for remote code execution on the scaffolder-backend instance. This was only exploitable in the template YAML definition itself and not by user input data. This is vulnerability is fixed in version 1.15.0 of `@backstage/plugin-scaffolder-backend`.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/backstage/backstage/commit/fb7375507d56faedcb7bb3665480070593c8949aGitHubgithub.com/backstage/backstage/releases/tag/v1.15.0GitHubgithub.com/backstage/backstage/security/advisories/GHSA-wg6p-jmpc-xjmrGitHubgithub.com/backstage/backstage/commit/fb7375507d56faedcb7bb3665480070593c8949aGitHubgithub.com/backstage/backstage/releases/tag/v1.15.0GitHubgithub.com/backstage/backstage/security/advisories/GHSA-wg6p-jmpc-xjmr

How CyberStrike helps

Frequently asked questions

What is CVE-2023-35926?

CVE-2023-35926 is a high-severity vulnerability. It was published on June 22, 2023 and has a CVSS 3.1 base score of 8.0 (HIGH).

How severe is CVE-2023-35926?

This vulnerability has a CVSS 3.1 base score of 8.0, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2023-35926?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2023-35926?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-35926 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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