EUVD-2026-62369
GHSA-h853-8cgc-4pxc
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:L/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
Network-reachable stored XSS with scope change to other users' sessions; PR:L for required authentication, UI:R for victim page view, C:L added for potential session token exposure.
Primary rating from Vendor (m-files).
CVSS VectorVendor: m-files
Lifecycle Timeline
2DescriptionCVE.org
HTML injection vulnerability in M-Files Web before 26.8.16330.2 allows an authenticated attacker to affect web user interface contents displayed to other users.
AnalysisAI
HTML injection in M-Files Web before version 26.8.16330.2 enables authenticated attackers to inject malicious HTML into web UI elements that are subsequently rendered in the browsers of other authenticated users, constituting a stored cross-site scripting (XSS) primitive. The attack requires valid low-privileged credentials and passive victim interaction, constraining opportunistic mass exploitation, but the risk is meaningful in multi-user enterprise deployments where document management workflows create natural injection surfaces. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must hold a valid, low-privileged authenticated session in M-Files Web (PR:L confirmed by CVSS vector). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The vendor-assigned CVSS 4.0 score of 5.1 (Medium) is consistent with the attack profile: network-reachable but requiring authentication (PR:L) and victim interaction (UI:P), with limited integrity impact and no confidentiality or availability impact on the vulnerable system (VC:N/VI:L/VA:N) or subsequent systems (SC:N/SI:L/SA:N). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade M-Files Web to version 26.8.16330.2 or later, as confirmed by the vendor security advisory at https://empower.m-files.com/security-advisories/CVE-2026-18371. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-79 – Cross-site Scripting (XSS)
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External POC / Exploit Code
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