CVE-2021-39211Network attack vector

Unauthenticated server information disclosure via telemetry endpoint

Published Sep 15, 2021 · Updated Aug 4, 2024

Information disclosure in GLPI 9.2 through 9.5.5 allows remote attackers to read GLPI and server information via the telemetry endpoint. The unauthenticated ajax/telemetry.php script returns telemetry data to arbitrary HTTP callers instead of restricting the information to authorized users. Network reachability to the script is sufficient, and the reported consequence is reconnaissance-relevant disclosure without data modification or service interruption.

CVSS severity5.3
Medium
EPSS probability4.70%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in GLPI 9.2 through 9.5.5 allows remote attackers to read GLPI and server information via the telemetry endpoint. The unauthenticated ajax/telemetry.php script returns telemetry data to arbitrary HTTP callers instead of restricting the information to authorized users. Network reachability to the script is sufficient, and the reported consequence is reconnaissance-relevant disclosure without data modification or service interruption.

The record

CVE
CVE-2021-39211
Published
Sep 15, 2021
Updated
Aug 4, 2024
Vendor
GLPI Project
Product
GLPI
Classifications
CWE-200, T1592.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 15, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 9.2, < 9.5.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

GLPI Project · GLPIversion=>= 9.2, < 9.5.6

Published CVSS scores

5.3GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5.0NIST NVDAV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1592.002Gather Victim Host Information: Software

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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