# CVE-2026-124552: Webmin through 2.670 Stored XSS via Shorewall and Shorewall6 list.cgi

Status: published. Published: 2026-11-08. Updated: 2026-11-10.

Webmin through 2.670 contains a stored cross-site scripting vulnerability in the Shorewall and Shorewall6 modules' list.cgi, which renders table fields and COMMENT lines unescaped. Authenticated users with table edit permission can store JavaScript via savecmt.cgi or table entries that executes when other users, including root, view the list page.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulnCheck) — https://github.com/webmin/webmin/commit/01b988dbf1e8f9926eec4b041d913167e0cc280f

## Affected products and versions

- webmin / webmin (webmin/webmin): ≥ 0; ≤ 2.670 (affected, custom). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 4.0: 4.8 (medium); CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N; source: CNA: VulnCheck

- CVSS 3.1: 4.8 (medium); CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N; source: CNA: VulnCheck

- CVSS 4.0: 4.8 (medium); CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X; source: NVD: disclosure@vulncheck.com

- CVSS 3.1: 4.8 (medium); CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N; source: NVD: disclosure@vulncheck.com

- CISA KEV: No listing in collected sources

- EPSS: 0.19% as of 2026-11-10; percentile 8.77%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-79

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/webmin/webmin/issues/2908 (CNA: VulnCheck; issue-tracking)

- https://github.com/webmin/webmin (CNA: VulnCheck; product)

- https://github.com/webmin/webmin/commit/01b988dbf1e8f9926eec4b041d913167e0cc280f (CNA: VulnCheck; patch)

- https://github.com/webmin/webmin/blob/2.670/shorewall/list.cgi#L56-L78 (CNA: VulnCheck; technical-description)

- https://github.com/webmin/webmin/blob/2.670/shorewall6/list.cgi#L58-L75 (CNA: VulnCheck; technical-description)

- https://www.vulncheck.com/advisories/webmin-through-2.670-stored-xss-via-shorewall-and-shorewall6-list-cgi (CNA: VulnCheck; third-party-advisory)

- https://github.com/webmin/webmin (disclosure@vulncheck.com)

- https://github.com/webmin/webmin/blob/2.670/shorewall/list.cgi#L56-L78 (disclosure@vulncheck.com)

- https://github.com/webmin/webmin/blob/2.670/shorewall6/list.cgi#L58-L75 (disclosure@vulncheck.com)

- https://github.com/webmin/webmin/commit/01b988dbf1e8f9926eec4b041d913167e0cc280f (disclosure@vulncheck.com)

- https://github.com/webmin/webmin/issues/2908 (disclosure@vulncheck.com)

- https://www.vulncheck.com/advisories/webmin-through-2.670-stored-xss-via-shorewall-and-shorewall6-list-cgi (disclosure@vulncheck.com)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-124552; retrieved 2026-11-10; source updated 2026-11-10

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-124552; retrieved 2026-11-08; source updated 2026-11-08

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-124552; retrieved 2026-11-10; source updated Not reported

Revision: 4f7e3fc7f6e794db01be63493972a486cfca026bb5a674e51d2fabbb2bc5d4c6

Canonical: https://y2.dev/cve/CVE-2026-124552

## Agent and API access

Public CVE pages, Markdown, and JSON are free to read without an account or API key.

- Public catalog: https://y2.dev/cve/index.json. Follow nextCursor with the same search, filters, sort, and limit (1–100). A null cursor marks the end.

- WebMCP: search_cve_disclosures, get_cve_disclosure, get_cve_page_markdown, get_y2_cve_access. Available in compatible browsers.

- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

Collected public records only. Check source status for coverage and freshness.