What is CVE-2026-63003?

CVE-2026-63003 is a medium-severity vulnerability in Django-Cms, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-08-20.

How severe is CVE-2026-63003?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Django-Cms

CVE-2026-63003

django CMS is an easy-to-use and developer-friendly enterprise content management system powered by Django. Prior to 5.0.9, page duplication lacks an object-level authorization check on the source page. In cms/admin/forms.py, DuplicatePageForm.source accepts any Page, the AddPageForm constructor does not narrow a hidden source field, AddPageForm.clean does not validate the source against the user, and AddPageForm.save calls from_source. In cms/admin/pageadmin.py, duplicate and PageAdmin.has_add_permission check only whether a staff user may add a page. A crafted source value can therefore copy every placeholder and plugin from an unauthorized page with permissions=False, stripping source view restrictions and exposing content across sites or restricted subtrees when CMS_PERMISSION is enabled. This issue is fixed in versions 5.0.9.

Vulnerability class: IDOR (Insecure Direct Object Reference)

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Affected products

Django-cms — versions < 5.0.9

Weakness classification (CWE)

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-63003?: CVE-2026-63003 is a medium-severity vulnerability in Django-Cms, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-08-20.
How severe is CVE-2026-63003?: Medium severity. CVSS v3 base score is 6.5 out of 10.