What’s Vulnerable › Vulnerabilities

CVE-2026-61663: django CMS: Missing authorization in `render_object_structure` discloses non-PageContent placeholder structure to low-privileged staff

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-20 · updated 2026-10-26
• Weakness: CWE-639

Description

django CMS is an easy-to-use and developer-friendly enterprise content management system powered by Django. Prior to 5.0.9, render_object_structure fails to authorize non-PageContent objects that use PlaceholderRelationField. An active staff user without cms.use_structure or model-level view or change permission can request the //admin/cms/placeholder/object/<content_type_id>/structure/<object_id>/ endpoint with guessed content_type_id and object_id values. The response discloses placeholder slot names, plugin trees, plugin identifiers, labels, and object existence for frontend-editable objects. The fix applies user_can_view_placeholder_source to the non-PageContent branch while keeping the structure board read-only for view-only users. This issue is fixed in versions 5.0.9.

Affected products

• django-cms: before 5.0.9

References

• https://github.com/django-cms/django-cms/commit/9c82abfeb25471583e23906ea1ebef9202527b04
• https://github.com/django-cms/django-cms/pull/8703
• https://github.com/django-cms/django-cms/releases/tag/5.0.9
• https://github.com/django-cms/django-cms/security/advisories/GHSA-8qj2-c6q4-f399
• https://github.com/django-cms/django-cms/security/advisories/GHSA-8qj2-c6q4-f399

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