Description
Open Zaak is an open-source data and services layer for Dutch case-oriented working. From 1.13.0 until 1.27.2, 1.28.2, and 1.29.0, _import_document_row in src/openzaak/components/documenten/tasks.py uses the attacker-controlled bestandspad CSV field without ensuring that the resolved path remains under IMPORT_DOCUMENTEN_BASE_DIR. A client with an all-authorizations application token can supply an absolute or parent-traversal path to a file readable by the Celery service account. The worker copies that file into document storage, allowing its contents to be retrieved through the normal document download API and exposing server secrets or other private files. This issue is fixed in versions 1.27.2, 1.28.2, and 1.29.0.
References8
- github.com/open-zaak/open-zaak/commit/4b23957b55ab792bc2ba1fbc5…
- github.com/open-zaak/open-zaak/commit/69c78ce2a0edb45bec8809bc2…
- github.com/open-zaak/open-zaak/commit/8acd5e59e0132aa19284bf22f…
- github.com/open-zaak/open-zaak/releases/tag/1.27.2
- github.com/open-zaak/open-zaak/releases/tag/1.28.2
- github.com/open-zaak/open-zaak/releases/tag/1.29.0
- github.com/open-zaak/open-zaak/security/advisories/GHSA-x5cj-23…
- github.com/open-zaak/open-zaak/security/advisories/GHSA-x5cj-23…
Metrics
- CVSS 3.1
-
6.8
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N - EPSS — exploit probability
- 0% percentile: 34 · as of 10 November 2026
- CWE
- CWE-200
Could this be exploited in your environment?
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