CVE-2026-18372 PUBLISHED

CSS injection in M-Files Web

Assigner: M-Files Corporation
Reserved: 30.07.2026 Published: 19.08.2026 Updated: 19.08.2026

CSS injection vulnerability in M-Files Web before 26.8.16330.2 allows an authenticated vault administrator to inject arbitrary CSS, affecting the web user interface displayed to other vault users.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N
CVSS Score: 4.8

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	Low	Integrity	Low
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	High
User Interaction	Passive

CVSS 4.0

Product Status

Vendor	M-Files Corporation
Product	M-Files Web
Versions	Default: unaffected affected from 0 to 26.8.16330.2 (excl.)

References

https://empower.m-files.com/security-advisories/CVE-2026-18372

Problem Types

CWE-79 Improper neutralization of input during web page generation ('cross-site scripting') CWE