What’s Vulnerable › Vulnerabilities

CVE-2026-41233: Froxlor has a Reseller Domain Quota Bypass via Unvalidated adminid Parameter in Domains.add()

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-04-23 · updated 2026-06-17
• Weakness: CWE-863

Description

Froxlor is open source server administration software. Prior to version 2.3.6, in `Domains.add()`, the `adminid` parameter is accepted from user input and used without validation when the calling reseller does not have the `customers_see_all` permission. This allows a reseller to attribute newly created domains to any other admin, bypassing their own domain quota (since the wrong admin's `domains_used` counter is incremented) and potentially exhausting another admin's quota. Version 2.3.6 fixes the issue.

Affected products

• froxlor: before 2.3.6 — fixed in 2.3.6

How to fix

Upgrade to a fixed version: froxlor 2.3.6. Check the vendor advisory for mitigations.

References

• https://github.com/froxlor/froxlor/commit/bf47ba15329506e9f9662f9462463932aa80dff5
• https://github.com/froxlor/froxlor/releases/tag/2.3.6
• https://github.com/froxlor/froxlor/security/advisories/GHSA-jvx4-xv3m-hrj4
• https://github.com/froxlor/froxlor/security/advisories/GHSA-jvx4-xv3m-hrj4

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