What’s Vulnerable › Vulnerabilities

CVE-2026-18856: Poesis Rhymix CMS Data Import importer.admin.controller.php procImporterAdminCheckXmlFile server-side request forgery

• Severity: medium (CVSS 4.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-05 · updated 2026-10-23
• Weakness: CWE-918

Description

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.

Affected products

• Poesis Rhymix CMS: 2.1.0, 2.1.1, 2.1.2, 2.1.3, 2.1.4, 2.1.5 (+28)

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
• https://vuldb.com/vuln/385868
• https://vuldb.com/vuln/385868/cti

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