# CVE-2026-124552: Webmin stored cross-site scripting in Shorewall modules

Source: https://junglewise.ai/threats/cve-2026-124552-webmin-through-2-670-contains-a-stored-cross-site-scripting  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-08. Updated: 2026-11-08  
License: CC BY 4.0 with a link back

CVE-2026-124552 · Severity: medium · CVSS 4.8 · Published 2026-11-08

Webmin is a web-based server management panel that includes firewall configuration modules for Shorewall. A stored XSS vulnerability in the Shorewall and Shorewall6 modules allows authenticated users with table edit permissions to inject malicious JavaScript that executes when other administrators—including root—view the configuration list. An attacker could steal credentials, modify firewall rules, or compromise the entire server.

Technologies: [Webmin](https://junglewise.ai/threats/technologies/webmin). Vendors: [Webmin](https://junglewise.ai/threats/vendors/webmin).

## Quick answers

**Is CVE-2026-124552 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-124552 being exploited in the wild.

**How severe is CVE-2026-124552?** Medium severity, with a CVSS score of 4.8, published 8 November 2026.

**Which products and versions are affected?** Webmin through 2.670.

**Is there a fix for CVE-2026-124552?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-124552 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-124552?** Check whether you run Webmin 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 vulnerability is a stored cross-site scripting (XSS) flaw in the list.cgi script of the Shorewall and Shorewall6 modules, where table fields and COMMENT lines are rendered without HTML escaping. An authenticated attacker with table edit permission can inject JavaScript via savecmt.cgi or table entry fields; the payload persists and executes in the browser context of any user viewing the list page, including privileged administrators.

## Affected products

- Webmin Webmin through 2.670

## Timeline

- 2026-11-08: disclosed

## References

- [https://github.com/webmin/webmin](https://github.com/webmin/webmin)
- [https://github.com/webmin/webmin/blob/2.670/shorewall/list.cgi](https://github.com/webmin/webmin/blob/2.670/shorewall/list.cgi)

## Related threats

- [Webmin users file injection in cert_issue.cgi](https://junglewise.ai/threats/cve-2026-126781-webmin-through-2-670-contains-a-users-file-injection)
- [Webmin privilege escalation in ACL group module assignment](https://junglewise.ai/threats/cve-2026-126780-webmin-through-2-670-contains-a-privilege-escalation)
- [Webmin stored cross-site scripting in bind8 DNS records](https://junglewise.ai/threats/cve-2026-125392-webmin-through-2-670-contains-a-stored-cross-site-scripting)
- [Webmin OS command injection in samba/save_euser.cgi](https://junglewise.ai/threats/cve-2026-125391-webmin-through-2-670-contains-an-os-command-injection)
- [Webmin SSRF in URL download functionality](https://junglewise.ai/threats/cve-2026-102337-webmin-is-a-web-based-system-administration-tool-for-unix-like)