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CVE-2025-8066 – Open Redirect vulnerability in BunkerWeb UI 1.6.X (< 1.6.4)

Low
TheophileDiot published GHSA-xxx9-3fh5-g585 Aug 18, 2025

Package

BunkerWeb UI (Linux / Docker / Kubernetes)

Affected versions

< 1.6.4

Patched versions

1.6.4

Description

Impact

An Open Redirect vulnerability (CWE-601) affects BunkerWeb UI 1.6.X (< 1.6.4).
The flaw is located in the /loading endpoint, which mishandles the next parameter.
Attackers can craft protocol-relative URLs (e.g., ?next=//malicious.site/) that cause users—authenticated or not—to be redirected to arbitrary external domains.
This can be abused in phishing scenarios, tricking users into trusting malicious sites.

Patches

BunkerWeb 1.6.4 integrates a patch to fix the vulnerability.

References

Severity

Low

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N

CVE ID

CVE-2025-8066

Weaknesses

URL Redirection to Untrusted Site ('Open Redirect')

The web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a redirect. Learn more on MITRE.