CVE-2026-41230: froxlor — Exploit & Fix

Description

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.

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CVSS v3.1 Score

8.5

HIGH

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

EPSS — Exploit Prediction

0.0005

Probability of exploitation

0.16%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-93 CWE-93

Affected Products

Vendor	Product	Versions
froxlor	froxlor	< 2.3.6

References

Advisories & Patches

https://github.com/froxlor/froxlor/commit/47a8af5d9523cb6ec94567405cfc2e294d3a1442 https://github.com/froxlor/froxlor/security/advisories/GHSA-47hf-23pw-3m8c https://github.com/froxlor/froxlor/security/advisories/GHSA-47hf-23pw-3m8c

Exploits

https://github.com/froxlor/froxlor/security/advisories/GHSA-47hf-23pw-3m8c https://github.com/froxlor/froxlor/security/advisories/GHSA-47hf-23pw-3m8c

Other References

https://github.com/froxlor/froxlor/releases/tag/2.3.6

Frequently Asked Questions

What is 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. It has a CVSS v3.1 base score of 8.5 (HIGH).

How severe is CVE-2026-41230? +

CVE-2026-41230 has a CVSS v3.1 score of 8.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0005, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-41230? +

CVE-2026-41230 affects products from froxlor, specifically: froxlor. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-41230? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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