What’s Vulnerable › Vulnerabilities
CVE-2026-34212: Docmost page content has stored XSS via unsanitized attachment URLs
- Severity: medium (CVSS 5.4 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: yes
- Published: 2026-04-14 · updated 2026-07-24
- Weakness: CWE-79
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.
Affected products
- docmost: before 0.71.0 — fixed in 0.71.0
How to fix
Upgrade to a fixed version: docmost 0.71.0. Check the vendor advisory for mitigations.
References
Get alerted when CVE-2026-34212 or the next vulnerability affects your stack