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No exploitation reportedFix available

CVE-2021-21327

No exploitation reported by the sources we read.

  • Published2021-03-08
  • Fixed in9.5.4
  • WeaknessCWE-470 · CWE-862

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

GLPI is an open-source asset and IT management software package that provides ITIL Service Desk features, licenses tracking and software auditing. In GLPI before version 9.5.4 non-authenticated user can remotely instantiate object of any class existing in the GLPI environment that can be used to carry out malicious attacks, or to start a “POP chain”. As an example of direct impact, this vulnerability affects integrity of the GLPI core platform and third-party plugins runtime misusing classes which implement some sensitive operations in their constructors or destructors. This is fixed in version 9.5.4.

Timeline

dates in UTC
  1. 2021-03-0817:15CVE publishedNVD

Versions per branch

NVD
Glpi-project glpi
BranchAffectedFixed in
9.5< 9.5.49.5.4

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • glpiUbuntu:16.04:LTSall versions · no fixed version listed

Vendor advisories

  • CVE-2021-21327 Red Hat Product Security

    glpi: Unsafe Reflection in getItemForItemtype()

Full record on NVD

Fix

  1. Update Glpi-project glpi to 9.5.4

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • CNACVSS 3.16.8known since 2026-10-23
  • NVDCVSS 3.17.5read 2026-10-23
  • NVDCVSS 2.05read 2026-10-23
  • CNAweakness (CWE)CWE-862known since 2026-10-23
  • NVDweakness (CWE)CWE-470read 2026-10-23
  • FIRST EPSSEPSS score2.5 %2026-11-09
  • OSVaffected packages—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Published
2021-03-08
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2021-21327?

GLPI is an open-source asset and IT management software package that provides ITIL Service Desk features, licenses tracking and software auditing. In GLPI before version 9.5.4 non-authenticated user can remotely instantiate object of any class existing in the GLPI environment that can be used to carry out malicious attacks, or to start a “POP chain”. As an example of direct impact, this vulnerability affects integrity of the GLPI core platform and third-party plugins runtime misusing classes which implement some sensitive operations in their constructors or destructors. This is fixed in version 9.5.4.

Is CVE-2021-21327 actively exploited?

Active exploitation of CVE-2021-21327 has not been confirmed. Its EPSS score was 2.5% on 2026-11-09, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-21327?

CVE-2021-21327 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

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