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Vulnerability record · CVE-2021-43778 · published 24 November 2021

CVE-2021-43778: GLPI Barcode plugin path traversal in send.php

Glpi Project · Barcode

The GLPI Barcode plugin before version 2.6.1 contains a path traversal flaw (CWE-22) reachable through the front/send.php endpoint. An unauthenticated remote attacker can read files outside the intended directory on a GLPI instance that has the plugin installed. The issue is patched in 2.6.1, and deleting front/send.php is documented as a workaround.

7.5 CVSS 3.1 High EPSS 53% · top 1.1% CWE-22 · Path traversal
7.5CVSS 3.1 base score, v2 5.0
53%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
9References, 2 tagged exploit
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Automated analysis

Generated by VULONE's analysis model from the NVD record, CISA KEV and EPSS data on 20 September 2026. Confidence: high.

high priorityUnauthenticated network-reachable file read with a high EPSS score and public exploit code, though no KEV listing and only confidentiality impact.

What it is

The GLPI Barcode plugin before version 2.6.1 contains a path traversal flaw (CWE-22) reachable through the front/send.php endpoint. An unauthenticated remote attacker can read files outside the intended directory on a GLPI instance that has the plugin installed. The issue is patched in 2.6.1, and deleting front/send.php is documented as a workaround.

Impact

An attacker gains unauthorized read access to files on the server, which can expose configuration, credentials or other sensitive data. There is no integrity or availability impact per the CVSS vector.

Attack surface

Reachable over the network via HTTP against the plugin's front/send.php endpoint. The CVSS vector (AV:N/AC:L/PR:N/UI:N) indicates no authentication and no user interaction are required.

Exploitation

Not listed in CISA KEV, but EPSS is high (0.527, 98.9th percentile) and public exploit code is referenced, indicating meaningful real-world exploitation likelihood.

What to do

  • Upgrade the GLPI Barcode plugin to version 2.6.1 or later.
  • If immediate upgrade is not possible, delete the front/send.php file as the vendor-documented workaround.
  • Restrict network access to GLPI instances and the barcode plugin endpoints to trusted users or networks.
  • Verify the plugin is actually installed and remove it if barcode/QR printing is not required.

Detection

  • Review web server logs for requests to the barcode plugin's front/send.php containing traversal sequences such as ../ or encoded variants.
  • Alert on HTTP responses from send.php returning file contents outside expected barcode output paths.
  • Monitor for unexpected access to sensitive files (e.g., configuration or credential files) originating from the GLPI host.

This assessment is produced automatically and is not human-reviewed. Verify against the vendor advisory before acting on it.

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/hansmach1ne/MyExploits/tree/main/Path%20Traversal%20in%20GLPI%20Barcode%20plugin ExploitThird Party Advisory
https://github.com/pluginsGLPI/barcode/commit/428c3d9adfb446e8492b1c2b7affb3d34072ff46 PatchThird Party Advisory
https://github.com/pluginsGLPI/barcode/releases/tag/2.6.1 Release NotesThird Party Advisory
https://github.com/pluginsGLPI/barcode/security/advisories/GHSA-2pjh-h828-wcw9 PatchThird Party Advisory
https://github.com/hansmach1ne/CVE-portfolio/tree/main/CVE-2021-43778
https://github.com/hansmach1ne/MyExploits/tree/main/Path%20Traversal%20in%20GLPI%20Barcode%20plugin ExploitThird Party Advisory
https://github.com/pluginsGLPI/barcode/commit/428c3d9adfb446e8492b1c2b7affb3d34072ff46 PatchThird Party Advisory
https://github.com/pluginsGLPI/barcode/releases/tag/2.6.1 Release NotesThird Party Advisory
https://github.com/pluginsGLPI/barcode/security/advisories/GHSA-2pjh-h828-wcw9 PatchThird Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2021-43778), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.