# CVE-2026-100714: Froxlor argument injection in Let's Encrypt challenge path setting

Source: https://junglewise.ai/threats/cve-2026-100714-froxlor-before-2-3-12-does-not-restrict-or-escape-the-system  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-26. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-100714 · Severity: critical · CVSS 9.1 · Published 2026-09-26

Froxlor is a web hosting control panel that manages SSL/TLS certificates via Let's Encrypt automation. An administrator or attacker with settings modification rights can inject malicious arguments into the Let's Encrypt certificate renewal command, gaining root-level code execution on the hosting panel server when the automated renewal cron job runs.

Technologies: [Froxlor](https://junglewise.ai/threats/technologies/froxlor). Vendors: [Froxlor](https://junglewise.ai/threats/vendors/froxlor).

## Quick answers

**Is CVE-2026-100714 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-100714 being exploited in the wild.

**How severe is CVE-2026-100714?** Critical severity, with a CVSS score of 9.1, published 26 September 2026.

**Which products and versions are affected?** Froxlor before 2.3.12, up to and including 2.3.10.

**Is there a fix for CVE-2026-100714?** A patch was published on 2026-09-26: Fix released in version 2.3.12 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-100714 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-100714?** Check whether you run Froxlor at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The system.letsencryptchallengepath configuration setting is concatenated unescaped into an acme.sh command line executed by root cron via FileDir::safe_exec(). While safe_exec blacklists shell metacharacters (;|&><\$~?), it permits spaces and quotes, allowing word-splitting into arbitrary acme.sh arguments. An authenticated admin or API actor can inject options like --renew-hook, --pre-hook, --post-hook, or --config-home to achieve arbitrary command execution as root or write arbitrary files.

## Affected products

- Froxlor Froxlor before 2.3.12, up to and including 2.3.10

## Timeline

- 2026-09-26: disclosed: Public advisory published
- 2026-09-26: patched: Fix released in version 2.3.12

## References

- [https://github.com/froxlor/froxlor/security/advisories/GHSA-3w4g-cmpj-rj42](https://github.com/froxlor/froxlor/security/advisories/GHSA-3w4g-cmpj-rj42)
- [https://www.vulncheck.com/advisories/froxlor-before-2.3.12-command-injection-via-letsencryptchallengepath](https://www.vulncheck.com/advisories/froxlor-before-2.3.12-command-injection-via-letsencryptchallengepath)

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