Auth bypass in Debian Zulucrypt

CVE-2025-53391

The Debian zuluPolkit/CMakeLists.txt file for zuluCrypt through the zulucrypt_6.2.0-1 package has insecure PolicyKit allow_any/allow_inactive/allow_active settings that allow a local user to escalate their privileges to root.

Vulnerability class: Broken Access Control

Published · last modified .

CVSS v3 metric

CVSS v3 base score 9.3 (Critical). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.002 (4.6th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 5th percentile — 4.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2025-53391: held from 0.002 to 0.002.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2025-53391?
CVE-2025-53391 is a critical-severity vulnerability in Debian Zulucrypt, classified under Incorrect Authorization. CVSS score: 9.3/10. Published 2025-06-28.
How severe is CVE-2025-53391?
Critical severity. CVSS v3 base score is 9.3 out of 10.
Is CVE-2025-53391 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.