CVE-2026-53906 PUBLISHED

Path Disclosure and Path Traversal in MCO

Assigner: CERT-PL
Reserved: 11.06.2026 Published: 01.07.2026 Updated: 01.07.2026

MCO is vulnerable to Path Disclosure and Path Traversal in file handling functionality related to data export and upload. Improper validation of the filename parameter allows writing files to arbitrary locations as well as indirect disclosure of absolute server paths through error messages.

Because vendor contact attempts were unsuccessful, the vulnerability has only been confirmed in version 25.3.3.1 but may also affect other versions.

Metrics

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
CVSS Score: 5.1

Product Status

Vendor MyComplianceOffice
Product MCO
Versions Default: unknown
  • Version 25.3.3.1 is affected

Credits

  • Hubert Decyusz (AFINE Team) finder

References

Problem Types

  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') CWE
  • CWE-209 Generation of Error Message Containing Sensitive Information CWE

Impacts

  • CAPEC-139 Relative Path Traversal