CVE-2021-43800
What it is
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).
At a glance
- Exploitability
- Can be exploited over the network without logging in. High risk of data exposure.
- Exploit odds
- 1.8% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 1.8% in the next 30 days (EPSS).
- Severity: 7.5 HIGH (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 1.8% · EPSS, next 30 days
- Weakness
- CWE-22 · Path traversal
- Record status
- Modified
Affected
- Requarks wiki.js < 2.5.245
Attack profile CVSS 3.1 · 7.5
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Raw vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2021-43800.md and follow it. Check whether this project is affected by CVE-2021-43800. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://github.com/Requarks/wiki/commit/414033de9dff66a327e3f3243234852f468a9d85
- https://github.com/Requarks/wiki/releases/tag/2.5.254
- https://github.com/Requarks/wiki/security/advisories/GHSA-r363-73gj-6j25
- https://github.com/Requarks/wiki/commit/414033de9dff66a327e3f3243234852f468a9d85
- https://github.com/Requarks/wiki/releases/tag/2.5.254
- https://github.com/Requarks/wiki/security/advisories/GHSA-r363-73gj-6j25
References
- https://github.com/Requarks/wiki/commit/414033de9dff66a327e3f3243234852f468a9d85
- https://github.com/Requarks/wiki/releases/tag/2.5.254
- https://github.com/Requarks/wiki/security/advisories/GHSA-r363-73gj-6j25
- https://github.com/Requarks/wiki/commit/414033de9dff66a327e3f3243234852f468a9d85
- https://github.com/Requarks/wiki/releases/tag/2.5.254
- https://github.com/Requarks/wiki/security/advisories/GHSA-r363-73gj-6j25