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CVE-2026-18372

CSS injection in M-Files Web

MEDIUM
4.8
CVSS Score
Published: August 19, 2026 at 11:47 AM UTC
Updated: October 22, 2026 at 08:09 AM UTC
1 product affected across 1 vendorFiles M Files

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Severity
MEDIUM4.8
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Files M Files· M Files
90%
0 ≤ v < 26.8.16330.20
Affected range stops below 26.8.16330.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisory
Source: cverecord
https://empower.m-files.com/security-advisories/CVE-2026-18372

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.8MEDIUMM-Files Corporation
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-79

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