CVE-2025-68435

Critical

Description

Zerobyte is a backup automation tool Zerobyte versions prior to 0.18.5 and 0.19.0 contain an authentication bypass vulnerability where authentication middleware is not properly applied to API endpoints. This results in certain API endpoints being accessible without valid session credentials. This is dangerous for those who have exposed Zerobyte to be used outside of their internal network. A fix has been applied in both version 0.19.0 and 0.18.5. If immediate upgrade is not possible, restrict network access to the Zerobyte instance to trusted networks only using firewall rules or network segmentation. This is only a temporary mitigation; upgrading is strongly recommended.

SeverityCritical
CVSS9.1
Exploit probability35. percentile0.4%
ProductNicotsx Zerobyte
PublishedDec 17, 2025
First seenDec 17, 2025
Weakness typeCWE-305CWE-305

How to fix

Update
  • nicotsx zerobyte0.18.5 or later

Affected products

ProductAffected versionsFixed in
nicotsx zerobytev < 0.18.5, 0.19.00.18.5

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Choose the product and enter the version you run to see whether it falls in the affected range.

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