CVE-2026-42321Network attack vector

Stored XSS via unencoded asset-lock output

Published Jun 3, 2026 · Updated Jun 3, 2026

Stored XSS in GLPI 10.0.4 through 10.0.24 allows remote authenticated users with technician rights to run scripts via asset locks. The asset-lock tab stores a technician-supplied payload and later renders it without the output encoding needed to prevent browser interpretation. A separate user must view the poisoned asset-lock content; the script then runs in that user's GLPI browser context and can act with that session's access.

CVSS severity8.4
High
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in GLPI 10.0.4 through 10.0.24 allows remote authenticated users with technician rights to run scripts via asset locks. The asset-lock tab stores a technician-supplied payload and later renders it without the output encoding needed to prevent browser interpretation. A separate user must view the poisoned asset-lock content; the script then runs in that user's GLPI browser context and can act with that session's access.

The record

CVE
CVE-2026-42321
Published
Jun 3, 2026
Updated
Jun 3, 2026
Vendor
GLPI Project
Product
GLPI
Classifications
CWE-79, CWE-116, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 3, 2026Record 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=>= 10.0.4, < 10.0.25

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

GLPI Project · GLPIversion=>= 10.0.4, < 10.0.25

Published CVSS scores

8.4GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA: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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-116Improper Encoding or Escaping of Output
T1203Exploitation for Client Execution

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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