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VulnerabilityPublished

CVE-2026-100717: froxlor · In versions 2.3.10 and earlier, Validate::validateUrl rejects carriage return and line feed characters only in the path, query and fragment

Affects froxlorSource GCVE Database

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Not known to be exploited · CVSS 9.9 Critical : upgrade to 2.3.12 as a priority.

Data as of 10 Nov 2026, 23:24 UTC

CVSS 3.1 base score
9.9Critical
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 22% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 2.3.12
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 26 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 11 Nov 2026.

What to do

Upgrade froxlor/froxlor to 2.3.12.

Affected software

ProductAffectedFixed in
GitHubfroxlor/froxlorpkg:github/froxlor/froxlorOther threatsAffected
  • <2.3.12
Fixed in
  • 2.3.12

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade froxlor to version 2.3.12 or later, where this vulnerability is fixed. No other mitigation is required as the fix addresses the root cause by properly validating the userinfo component of URLs.

Description

In froxlor versions 2.3.10 and earlier, the URL validation function Validate::validateUrl does not properly inspect the userinfo component of URLs for carriage return and line feed characters. This allows an authenticated low-privilege user with subdomain creation rights to inject malicious payloads into the web server configuration. The injected directives can execute with root privileges, enabling server-wide impact such as response hijacking or local file reading. The vulnerability is fixed in version 2.3.12.

References

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