Nim's rst parser sandboxed mode allows include which can embed any local file
CVE-2022-23602

8.1HIGH

Key Information:

Vendor
Nim-lang
Status
Docutils
Nimforum
Vendor
CVE Published:
1 February 2022

Summary

Nimforum is a lightweight alternative to Discourse written in Nim. In versions prior to 2.2.0 any forum user can create a new thread/post with an include referencing a file local to the host operating system. Nimforum will render the file if able. This can also be done silently by using NimForum's post "preview" endpoint. Even if NimForum is running as a non-critical user, the forum.json secrets can be stolen. Version 2.2.0 of NimForum includes patches for this vulnerability. Users are advised to upgrade as soon as is possible. There are no known workarounds for this issue.

References

https://github.com/nim-lang/nimforum/security/advisories/...
x_refsource_CONFIRM
https://github.com/nim-lang/Nim/commit/cb894c7094fb49014f...
x_refsource_MISC

CVSS V3.1

Score:
8.1
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.