XSS in Frappe
CVE-2026-81731
Frappe 15.11.0 through 16.32.0 stores and renders the workspace card description without XSS filtering. The description field of the Workspace Link doctype is declared with "ignore_xss_filter": 1 in frappe/desk/doctype/workspace_link/workspace_link.json, and _sanitize_content() in frappe/model/base_document.py skips any field carrying that flag, so the value is stored exactly as submitted. frappe.desk.desktop.get_desktop_page returns it unchanged, and LinksWidget.set_body() in frappe/public/js/frappe/widgets/links_widget.js interpolates it into a Bootstrap popover created with html: true, by way of the __() translation helper, which performs no HTML escaping. A user holding the Workspace Manager role can therefore place arbitrary markup in a public workspace's card description and have it execute in the session of any desk user who opens that workspace and hovers the description, including higher-privileged users, allowing session token theft and authenticated requests as the victim. The flag is removed on the development branch but remains present in the shipped 15.x and 16.x release lines, so no released version carries the fix.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (21.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 21st percentile — 21.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
Weakness classification (CWE)
References
- github.com/frappe/frappe (Product, product)
- github.com/frappe/frappe/blob/v16.32.0/frappe/desk/doctype/workspace_link/works… (Product, technical-description)
- github.com/frappe/frappe/blob/v16.32.0/frappe/public/js/frappe/widgets/links_wi… (Product, technical-description)
- Patch Commit (Patch, patch)
- VulnCheck Advisory: Frappe 15.11.0 through 16.32.0 Stored XSS via Workspace Link Description (Patch, Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-81731?
- CVE-2026-81731 is a medium-severity vulnerability in Frappe, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-08-27.
- How severe is CVE-2026-81731?
- Medium severity. CVSS v3 base score is 5.4 out of 10.