Vulnerability in Froxlor
CVE-2026-41230
Froxlor is open source server administration software. Prior to version 2.3.6, `DomainZones::add()` accepts arbitrary DNS record types without a whitelist and does not sanitize newline characters in the `content` field. When a DNS type not covered by the if/elseif validation chain is submitted (e.g., `NAPTR`, `PTR`, `HINFO`), content validation is entirely bypassed. Embedded newline characters in the content survive `trim()` processing, are stored in the database, and are written directly into BIND zone files via `DnsEntry::__toString()`. An authenticated customer can inject arbitrary DNS records and BIND directives (`$INCLUDE`, `$ORIGIN`, `$GENERATE`) into their domain's zone file. Version 2.3.6 fixes the issue.
Vulnerability class: CRLF Injection
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:L.
EPSS exploit prediction
EPSS: 0.005 (42.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 42.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.002
Affected products
- Froxlor — versions < 2.3.6
Weakness classification (CWE)
References
- github.com/froxlor/froxlor/security/advisories/GHSA-47hf-23pw-3m8c (Exploit, Mitigation, Vendor Advisory)
- github.com/froxlor/froxlor/commit/47a8af5d9523cb6ec94567405cfc2e294d3a1442 (Patch)
- github.com/froxlor/froxlor/releases/tag/2.3.6 (Release Notes)
Frequently asked questions
- What is CVE-2026-41230?
- CVE-2026-41230 is a high-severity vulnerability in Froxlor, classified under CRLF Injection. CVSS score: 8.5/10. Published 2026-04-23.
- How severe is CVE-2026-41230?
- High severity. CVSS v3 base score is 8.5 out of 10.