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.

CVSS 4.0

2.0CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

CVSS 3.1

4.7CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L

EPSS

0.4% chance of exploitation in the next 30 days; higher than 33% of CVEs (scores of 2026-10-25)

CWE

CWE-918

Published

2026-08-05

Modified

2026-10-23

Record from

the NVD, synced 2026-10-24

References

• https://github.com/MCzhao2006/Rhymix-SSRF-Report
• https://rhymix.org/files/attach/releases/rhymix-2.1.34.zip
• https://rhymix.org/news/1948042
• https://vuldb.com/cve/CVE-2026-18856
• https://vuldb.com/submit/858471

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