CVE-2026-27553

Medium CVSS 6.5

Published 2026-09-16 · last changed 2026-09-19

The fix

We hold no Microsoft remediation data for CVE-2026-27553, which normally means it is not a Windows CVE. For non-Microsoft software the fix is the vendor's own updated release, and the affected versions are listed below.

What it is

A low-privileged remote attacker can manipulate the schema path parameter in the /index.php/diagnostics_tab/ajax_diag_table_rows endpoint using a valid user cookie allowing disclosure of all user password hashes.

Sources

NVD record for CVE-2026-27553

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N