What is CVE-2026-18856?

CVE-2026-18856 is a medium-severity vulnerability in Poesis Rhymix Cms, classified under Server-Side Request Forgery (SSRF). CVSS score: 4.7/10. Published 2026-08-05.

How severe is CVE-2026-18856?

Medium severity. CVSS v3 base score is 4.7 out of 10.

SSRF in Poesis Rhymix Cms

CVE-2026-18856

A vulnerability was determined in Poesis Rhymix CMS up to 2.1.33. This impacts the function procImporterAdminCheckXmlFile of the file modules/importer/importer.admin.controller.php of the component Data Import Module. This manipulation of…

Vulnerability class: SSRF (Server-Side Request Forgery)

CVSS v3 metric

CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L.

Affected products

Poesis Rhymix Cms — versions 2.1.0, 2.1.1, 2.1.2

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

cna@vuldb.com (technical-description, vdb-entry)
cna@vuldb.com (signature, permissions-required)
cna@vuldb.com (third-party-advisory)
cna@vuldb.com (third-party-advisory)
cna@vuldb.com (exploit)
cna@vuldb.com (related)
cna@vuldb.com (patch)

Frequently asked questions

What is CVE-2026-18856?: CVE-2026-18856 is a medium-severity vulnerability in Poesis Rhymix Cms, classified under Server-Side Request Forgery (SSRF). CVSS score: 4.7/10. Published 2026-08-05.
How severe is CVE-2026-18856?: Medium severity. CVSS v3 base score is 4.7 out of 10.