CVE-2026-18372: CWE-79 Improper neutralization of input during web page generation ('cross-site scripting') in M-Files Corporation M-Files Web
CVE-2026-18372 is a CSS injection vulnerability in M-Files Web versions before 26.8.16330.2. It allows an authenticated vault administrator to inject arbitrary CSS code, which affects the web user interface seen by other vault users. The vulnerability is classified as CWE-79 (Improper Neutralization of Input During Web Page Generation, i.e., Cross-Site Scripting).
AI Analysis
Technical Summary
This vulnerability in M-Files Web prior to version 26.8.16330.2 enables an authenticated vault administrator to inject arbitrary CSS into the web interface. This CSS injection can alter the appearance or behavior of the web UI for other users accessing the vault. The issue is categorized under CWE-79, indicating improper input neutralization during web page generation. The CVSS 4.0 base score is 4.8 (medium severity), with network attack vector, low attack complexity, and requiring privileges of a high-level authenticated user with user interaction.
Potential Impact
An authenticated vault administrator can inject arbitrary CSS that affects the web interface displayed to other vault users. This could potentially be used to manipulate the UI or perform visual spoofing, but it does not directly allow code execution or data theft. The impact is limited to UI manipulation and requires high privileges and user interaction.
Mitigation Recommendations
A fixed version is available starting from 26.8.16330.2. Users should upgrade M-Files Web to version 26.8.16330.2 or later to remediate this vulnerability. No additional mitigation steps are indicated in the vendor advisory.
CVE-2026-18372: CWE-79 Improper neutralization of input during web page generation ('cross-site scripting') in M-Files Corporation M-Files Web
Description
CVE-2026-18372 is a CSS injection vulnerability in M-Files Web versions before 26.8.16330.2. It allows an authenticated vault administrator to inject arbitrary CSS code, which affects the web user interface seen by other vault users. The vulnerability is classified as CWE-79 (Improper Neutralization of Input During Web Page Generation, i.e., Cross-Site Scripting).
CVSS v4.0
Score 4.8medium
Affected software
M-Files Corporation
M-Files Web
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in M-Files Web prior to version 26.8.16330.2 enables an authenticated vault administrator to inject arbitrary CSS into the web interface. This CSS injection can alter the appearance or behavior of the web UI for other users accessing the vault. The issue is categorized under CWE-79, indicating improper input neutralization during web page generation. The CVSS 4.0 base score is 4.8 (medium severity), with network attack vector, low attack complexity, and requiring privileges of a high-level authenticated user with user interaction.
Potential Impact
An authenticated vault administrator can inject arbitrary CSS that affects the web interface displayed to other vault users. This could potentially be used to manipulate the UI or perform visual spoofing, but it does not directly allow code execution or data theft. The impact is limited to UI manipulation and requires high privileges and user interaction.
Mitigation Recommendations
A fixed version is available starting from 26.8.16330.2. Users should upgrade M-Files Web to version 26.8.16330.2 or later to remediate this vulnerability. No additional mitigation steps are indicated in the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- M-Files Corporation
- Date Reserved
- 2026-07-30T10:05:36.954Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a859cabacd9273b4909e3ee
Added to database: 08/19/2026, 12:08:11 UTC
Last enriched: 09/11/2026, 09:32:47 UTC
Last updated: 10/02/2026, 02:46:03 UTC
Views: 62
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