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TI-2026-75431 Aliases CVE-2026-111645GHSA-x63c-25rw-gwj4

Missing authorization in MrDoc allows editing other users' documents

Priority MEDIUM 57CWE-639Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
Low · Low · None
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-639.

Summary

MrDoc through 1.1.1 contains a missing object-level authorization check in the ImportLocalDoc API (CWE-639). An authenticated user with low privileges can modify other users' documents and projects by supplying document IDs they do not own. This allows publishing private drafts, reparenting documents, and injecting documents.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

MrDoc through 1.1.1 contains a missing object-level authorization vulnerability in the ImportLocalDoc API that allows authenticated users to modify other users' documents and projects. Attackers can send PUT requests with arbitrary sort_data document ids to publish private drafts and reparent documents, or POST with arbitrary top_doc ids to inject documents.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00265 18th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
zmister2016MrDocup to 1.1.1—No fix listedCNA
  • MrDoc Vendorzmister2016 Affected up to 1.1.1 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for MrDoc.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Timeline

  1. 2026-10-16 Threatist record created from CVE-2026-111645
  2. 2026-10-16 Alias added: GHSA-x63c-25rw-gwj4
  3. 2026-10-19 CISA SSVC decision points changed
  4. 2026-10-19 Priority changed: LOW → MEDIUM

References

Advisory 1

Other 1

  • TI-2026-83819 Missing authorization in MrDoc get_doctemp exposes other users' templates CVSS 4.0MEDIUM 5.3
  • TI-2026-81167 Broken access control in MrDoc lets users alter other users' shares CVSS 4.0MEDIUM 5.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences