Authenticated webserver directive injection via newline redirects
Published Sep 14, 2026 · Updated Sep 14, 2026
Configuration injection in Froxlor before 2.2.5 allows remote authenticated users to alter Apache or nginx behavior through redirect URLs. The subdomain redirect URL validator accepts literal newline characters, and the cron rebuild writes the value verbatim into virtual-host configuration files. Customer access and a configuration rebuild are required; injected directives can corrupt configuration, interrupt service, or hijack HTTP responses across hosted domains.
Summary
What happened
Configuration injection in Froxlor before 2.2.5 allows remote authenticated users to alter Apache or nginx behavior through redirect URLs. The subdomain redirect URL validator accepts literal newline characters, and the cron rebuild writes the value verbatim into virtual-host configuration files. Customer access and a configuration rebuild are required; injected directives can corrupt configuration, interrupt service, or hijack HTTP responses across hosted domains.
The record
- CVE
- CVE-2026-90937
- Published
- Sep 14, 2026
- Updated
- Sep 14, 2026
- Vendor
- Froxlor
- Product
- Froxlor
- Classifications
- T1190
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 14, 2026CVE publishedPublication date reported by the CVE source.
- Sep 14, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <2.2.5
What conditions does exploitation require?
What is affected?
Published CVSS scores
No CVSS assessment is available in this record.
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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