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CVE-2021-43800

7.5 · HIGH

Wiki.js is a wiki app built on Node.js.

Published Dec 6, 2021CWE-22EPSS 1.80%

Overview

CVE-2021-43800 is a high-severity vulnerability. It was published on December 6, 2021 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Wiki.js is a wiki app built on Node.js. Prior to version 2.5.254, directory traversal outside of Wiki.js context is possible when a storage module with local asset cache fetching is enabled on a Windows host. A malicious user can potentially read any file on the file system by crafting a special URL that allows for directory traversal. This is only possible on a Wiki.js server running on Windows, when a storage module implementing local asset cache (e.g Local File System or Git) is enabled and that no web application firewall solution (e.g. cloudflare) strips potentially malicious URLs. Commit number 414033de9dff66a327e3f3243234852f468a9d85 fixes this vulnerability by sanitizing the path before it is passed on to the storage module. The sanitization step removes any windows directory traversal sequences from the path. As a workaround, disable any storage module with local asset caching capabilities (Local File System, Git).

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/Requarks/wiki/commit/414033de9dff66a327e3f3243234852f468a9d85GitHubgithub.com/Requarks/wiki/releases/tag/2.5.254GitHubgithub.com/Requarks/wiki/security/advisories/GHSA-r363-73gj-6j25GitHubgithub.com/Requarks/wiki/commit/414033de9dff66a327e3f3243234852f468a9d85GitHubgithub.com/Requarks/wiki/releases/tag/2.5.254GitHubgithub.com/Requarks/wiki/security/advisories/GHSA-r363-73gj-6j25

How CyberStrike helps

Frequently asked questions

What is CVE-2021-43800?

CVE-2021-43800 is a high-severity vulnerability. It was published on December 6, 2021 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2021-43800?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2021-43800?

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-2021-43800?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-43800 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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