Cyber Resilience

CVE-2026-42321

HighUpdated

Published: 03 June 2026

Published
03 June 2026
Modified
17 June 2026
KEV Added
—
Patch
—
CVSS Score v4 8.4 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS Score 0.0034 26.2th percentile
Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2026-42321 is a high-severity Cross-site Scripting (CWE-79) vulnerability. Its CVSS base score is 8.4 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Content Injection (T1659); ranked at the 26.2th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

OWASP Top 10 for Web (2025)

A05:2025 Injection

EU & UK References

Vulnerability details

GLPI is a free asset and IT management software package. Starting in version 10.0.4 and prior to version 10.0.25, a technician can store an XSS payload in the asset locked tab. Upgrade to 10.0.25 or 11.0.7 to receive a patch.

CWE(s)
CWE-79CWE-116

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1659 Content Injection Initial Access
Adversaries may gain access and continuously communicate with victims by injecting malicious content into systems through online network traffic.
attack.mitre.org →
Why these techniques?

Stored XSS vulnerability (CWE-79) directly enables content injection into the web application.

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

CVEs Like This One

CVE-2026-48209Shared CWE-116, CWE-79
CVE-2026-27013Shared CWE-116, CWE-79
CVE-2026-32754Shared CWE-116, CWE-79
CVE-2025-27108Shared CWE-116, CWE-79
CVE-2026-40568Shared CWE-116, CWE-79
CVE-2025-27109Shared CWE-116, CWE-79
CVE-2026-45375Shared CWE-116, CWE-79
CVE-2026-25932Shared CWE-116, CWE-79
CVE-2025-23207Shared CWE-116, CWE-79
CVE-2026-35569Shared CWE-116, CWE-79

Affected Assets

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SI-15 Information Output Filtering
addresses: CWE-79 CWE-116

Output validation against expected content can reject or sanitize script content in generated web pages, reducing XSS exploitability.

CA-8 Penetration Testing
addresses: CWE-79

Penetration testing submits XSS payloads to web applications, detecting cross-site scripting flaws for subsequent remediation.

SI-10 Information Input Validation
addresses: CWE-79

Validates web inputs to reject script-related content that could produce XSS.

References