{"id":"CVE-2026-54622","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-54622","summary":"django CMS: Clipboard copy IDOR discloses unauthorized plugin content","details":"### Summary\n  The clipboard copy paths of the `copy_plugins` admin endpoint validate only   the target (the user's own clipboard) and skip source-side authorization. A staff user can copy plugins out of a placeholder they have no permission on   into their clipboard, then read the (secret) content.\n\n  ### Details\n  In `cms/admin/placeholderadmin.py`, `_copy_plugin_to_clipboard` and   `_copy_placeholder_to_clipboard` check `has_copy_plugins_permission`, which only  evaluates `request.toolbar.clipboard.has_add_plugins_permission(...)` — the\n  clipboard belongs to the requesting user, and `check_source` is likewise  applied only to the clipboard. The source placeholder identified by the  attacker-supplied `source_placeholder_id` / `source_plugin_id` is never  authorization-checked. (The placeholder-to-placeholder copy path,  `has_copy_from_placeholder_permission`, correctly checks both sides.)\n\n  ### Impact\n  A staff user holding the global add permission for a plugin type, but with no  access to a given placeholder/page, can copy that placeholder's plugins into  their own clipboard and read content (e.g. link names/URLs, text) they cannot  reach through the normal edit endpoints.\n\n  Requires `CMS_PERMISSION=True` with per-placeholder/page restrictions.\n\n  ### Patches\n  Fixed in 5.0.8: the clipboard copy paths now also verify   source-side permission (`has_add_plugins_permission` + `check_source` on the  source placeholder), matching placeholder-to-placeholder copy.\n\n  ### Workarounds\n  None. Upgrade is recommended.\n\n  ### Credits\n  Reported by the security team at the University of Sydney ([@reporter]).","published":"2026-08-20T18:42:11Z","modified":"2026-08-20T18:45:17.744388301Z","cvss":{"score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"PyPI","name":"django-cms","fixedVersion":"5.0.8"}],"fix":{"url":"https://github.com/django-cms/django-cms/pull/8645","label":"django-cms/django-cms#8645"},"references":[{"type":"WEB","url":"https://github.com/django-cms/django-cms/security/advisories/GHSA-4xfr-4p46-gc6p"},{"type":"WEB","url":"https://github.com/django-cms/django-cms/pull/8645"},{"type":"WEB","url":"https://github.com/django-cms/django-cms/commit/7642a98ab3170793c0b27b4125dd1f3d318b8a1c"},{"type":"PACKAGE","url":"https://github.com/django-cms/django-cms"},{"type":"WEB","url":"https://github.com/django-cms/django-cms/releases/tag/5.0.8"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-20T18:45:17.744388301Z"}}