CVE-2026-34212 MEDIUM

CVE-2026-34212: Docmost page content has stored XSS via unsanitized attachment URLs

Vendor Docmost
Product docmost
Weakness CWE-79 · XSS
Published April 14, 2026
Last update April 15, 2026

CVSS base score

5.4/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction Required
Confidentiality Low
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

What the vulnerability does

01Description

Docmost is open-source collaborative wiki and documentation software. In versions prior to 0.71.0, improper neutralization of attachment URLs in Docmost allows a low-privileged authenticated user to store a malicious `javascript:` URL inside an attachment node in page content. When another user views the page and activates the attachment link/icon, attacker-controlled JavaScript executes in the context of the Docmost origin. Version 0.71.0 patches the issue.

Key dates

02Disclosure timeline

April 14, 2026 CVE published
April 15, 2026 Record updated