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 the argument filename causes server-side request forgery. The attack is possible to be carried out remotely. The exploit has been publicly disclosed and may be utilized. Upgrading to version 2.1.34 will fix this issue. It is recommended to upgrade the affected component.
Vulnerability class: SSRF (Server-Side Request Forgery)
EPSS: 0.002 (13.7th percentile) — read the EPSS interpretation.
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)
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.