Security readout for executives and security teams
Plain-English summary
GLPI versions 9.2 through before 9.5.6 can expose GLPI and server information through a telemetry endpoint. The issue is information disclosure, not direct code execution. It matters because exposed platform details can help attackers profile an environment and plan follow-on attacks.
Executive priority
Treat this as a moderate-priority hardening item. It is not reported as actively exploited, but it leaks useful environment details and has a clear vendor fix and workaround.
Technical view
CVE-2021-39211 is a CWE-200 information exposure flaw in GLPI's telemetry endpoint. It affects glpi-project GLPI versions >= 9.2 and < 9.5.6. The CVSS 3.1 score is 5.3: network reachable, low complexity, no privileges or user interaction, low confidentiality impact, no integrity or availability impact.
Likely exposure
Internet-facing or broadly accessible GLPI deployments running versions 9.2 through 9.5.5 are the main concern, especially where ajax/telemetry.php remains present and reachable.
Exploitation context
The provided sources do not state active exploitation, and the CVE is not marked KEV. The exposure can still aid reconnaissance by revealing GLPI and server details to unauthenticated network users.
Researcher notes
Evidence is limited to the CVE record and GLPI advisory references. Validate version range, endpoint presence, and exposure. Avoid assuming broader GLPI components or other products are affected without vendor confirmation.
Mitigation direction
- Upgrade GLPI to version 9.5.6 or later.
- If upgrade is delayed, remove ajax/telemetry.php as the advisory workaround.
- Confirm remediation steps against GLPI's advisory and release notes.
Validation and detection
- Inventory all GLPI instances and record their installed versions.
- Verify affected deployments are upgraded to 9.5.6 or later.
- Check whether ajax/telemetry.php exists on any still-vulnerable deployment.
- Review external exposure for GLPI systems reachable from untrusted networks.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-200: Information exposure and cloud metadata lookup
Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2021-39211 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N3.91.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.3MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/glpi-project/glpi/releases/tag/9.5.6CVE reference · x_refsource_MISC
- https://github.com/glpi-project/glpi/security/advisories/GHSA-xx66-v3g5-w825CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Exposure of Sensitive Information to an Unauthorized Actor
Exposure of Sensitive Information to an Unauthorized Actor represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.