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CVE-2026-90937

froxlor before 2.2.5 nginx/Apache Configuration Injection via subdomain redirect URL

CVSS 4.0 9.4 CRITICALCVSS 3.1 9.9 CRITICALCheck source for fixed versionsKEV status unknown
Original advisory

cve-program · CVE-2026-90937

Published

froxlor versions before 2.2.5 fail to validate newline characters in subdomain redirect URLs, allowing authenticated customers to inject arbitrary nginx or Apache configuration directives. Attackers can supply URLs containing literal newlines that are written verbatim into vhost config files during cron rebuild, enabling web server configuration corruption, denial of service, or hijacking of HTTP responses across hosted domains.

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Affected versions, risk and source history

Exploitation and risk

Source status

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cve-program · CVE-2026-90937

Published

froxlor before 2.2.5 nginx/Apache Configuration Injection via subdomain redirect URL

froxlor versions before 2.2.5 fail to validate newline characters in subdomain redirect URLs, allowing authenticated customers to inject arbitrary nginx or Apache configuration directives. Attackers can supply URLs containing literal newlines that are written verbatim into vhost config files during cron rebuild, enabling web server configuration corruption, denial of service, or hijacking of HTTP responses across hosted domains.

Source published
14 Sep 2026 12:48:31 UTC
Source modified
16 Sep 2026 15:01:11 UTC
Saved here
23 Oct 2026 15:48:27 UTC
Source terms
CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

Source: cve-program · CVE Program Terms of Use. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS 4.0 · 9.4 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L

CVSS 3.1 · 9.9 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L

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Sources read 13 Nov 12:08 UTC · 274 of 275 readable · 272 fully read · documentation 469/469 current

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