CVE-2026-34212

MEDIUM

Docmost page content has stored XSS via unsanitized attachment URLs

Title source: cna
STIX 2.1

Description

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.

References (1)

Core 1
Core References

Scores

CVSS v3 5.4
EPSS 0.0020
EPSS Percentile 9.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-79
Status published
Products (1)
docmost/docmost < 0.71.0 (2 CPE variants)
Published Apr 14, 2026
Tracked Since Apr 15, 2026