CVE-2026-18856
📛 CVE Title
Poesis Rhymix CMS Data Import importer.admin.controller.php procImporterAdminCheckXmlFile server-side request forgery
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.
Overview
- State
- PUBLISHED
- Assigner (CNA)
- VulDB
- CVSS severity
- MEDIUM
- CVSS score
- 5.1 / 10
- CVSS vector
CVSS: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- Effective score
- 5.1 / 10 MEDIUM source: CNA overview
- CWE(s)
-
CWE-918 - Reserved
- 2026-08-04
- Published
- 2026-08-05 00:30 UTC
- Last updated
- 2026-08-05 00:30 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/18xxx/CVE-2026-18856.json
Affected products (1)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| Poesis | Rhymix CMS |
2.1.0 (affected),
2.1.1 (affected),
2.1.2 (affected),
2.1.3 (affected),
2.1.4 (affected),
2.1.5 (affected),
2.1.6 (affected),
2.1.7 (affected),
2.1.8 (affected),
2.1.9 (affected),
2.1.10 (affected),
2.1.11 (affected),
2.1.12 (affected),
2.1.13 (affected),
2.1.14 (affected),
2.1.15 (affected),
2.1.16 (affected),
2.1.17 (affected),
2.1.18 (affected),
2.1.19 (affected),
2.1.20 (affected),
2.1.21 (affected),
2.1.22 (affected),
2.1.23 (affected),
2.1.24 (affected),
2.1.25 (affected),
2.1.26 (affected),
2.1.27 (affected),
2.1.28 (affected),
2.1.29 (affected),
2.1.30 (affected),
2.1.31 (affected),
2.1.32 (affected),
2.1.33 (affected),
2.1.34 (unaffected)
|
— |
Vendor references (7)
References embedded in the original CVE record by the assigning CNA.
- VDB-385868 | Poesis Rhymix CMS Data Import importer.admin.controller.php procImporterAdminCheckXmlFile server-side request forgery vdb-entrytechnical-description
- VDB-385868 | CTI Indicators (IOB, IOC, IOA) signaturepermissions-required
- CVE-2026-18856 | CVE Analysis and Report third-party-advisory
- Submit #858471 | Poesis Inc. Rhymix CMS <=2.1.33 Server-Side Request Forgery third-party-advisory
- https://github.com/MCzhao2006/Rhymix-SSRF-Report exploit
- https://rhymix.org/news/1948042 related
- https://rhymix.org/files/attach/releases/rhymix-2.1.34.zip patch
Web references (0)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
No web references attached yet.
AI Forensic Analysis
Only Available for Registered Users. Sign in to view.
Raw JSON
The full cvelistV5 record. Download as CVE-2026-18856.json.
{
"containers": {
"cna": {
"affected": [
{
"cpes": [
"cpe:2.3:a:poesis:rhymix_cms:*:*:*:*:*:*:*:*"
],
"modules": [
"Data Import Module"
],
"product": "Rhymix CMS",
"vendor": "Poesis",
"versions": [
{
"status": "affected",
"version": "2.1.0"
},
{
"status": "affected",
"version": "2.1.1"
},
{
"status": "affected",
"version": "2.1.2"
},
{
"status": "affected",
"version": "2.1.3"
},
{
"status": "affected",
"version": "2.1.4"
},
{
"status": "affected",
"version": "2.1.5"
},
{
"status": "affected",
"version": "2.1.6"
},
{
"status": "affected",
"version": "2.1.7"
},
{
"status": "affected",
"version": "2.1.8"
},
{
"status": "affected",
"version": "2.1.9"
},
{
"status": "affected",
"version": "2.1.10"
},
{
"status": "affected",
"version": "2.1.11"
},
{
"status": "affected",
"version": "2.1.12"
},
{
"status": "affected",
"version": "2.1.13"
},
{
"status": "affected",
"version": "2.1.14"
},
{
"status": "affected",
"version": "2.1.15"
},
{
"status": "affected",
"version": "2.1.16"
},
{
"status": "affected",
"version": "2.1.17"
},
{
"status": "affected",
"version": "2.1.18"
},
{
"status": "affected",
"version": "2.1.19"
},
{
"status": "affected",
"version": "2.1.20"
},
{
"status": "affected",
"version": "2.1.21"
},
{
"status": "affected",
"version": "2.1.22"
},
{
"status": "affected",
"version": "2.1.23"
},
{
"status": "affected",
"version": "2.1.24"
},
{
"status": "affected",
"version": "2.1.25"
},
{
"status": "affected",
"version": "2.1.26"
},
{
"status": "affected",
"version": "2.1.27"
},
{
"status": "affected",
"version": "2.1.28"
},
{
"status": "affected",
"version": "2.1.29"
},
{
"status": "affected",
"version": "2.1.30"
},
{
"status": "affected",
"version": "2.1.31"
},
{
"status": "affected",
"version": "2.1.32"
},
{
"status": "affected",
"version": "2.1.33"
},
{
"status": "unaffected",
"version": "2.1.34"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "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."
}
],
"metrics": [
{
"cvssV4_0": {
"baseScore": 5.1,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS: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",
"version": "4.0"
}
},
{
"cvssV3_1": {
"baseScore": 4.7,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C",
"version": "3.1"
}
},
{
"cvssV3_0": {
"baseScore": 4.7,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C",
"version": "3.0"
}
},
{
"cvssV2_0": {
"baseScore": 5.8,
"vectorString": "AV:N/AC:L/Au:M/C:P/I:P/A:P/E:POC/RL:OF/RC:C",
"version": "2.0"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-918",
"description": "Server-Side Request Forgery",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-05T00:30:12.143Z",
"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"shortName": "VulDB"
},
"references": [
{
"name": "VDB-385868 | Poesis Rhymix CMS Data Import importer.admin.controller.php procImporterAdminCheckXmlFile server-side request forgery",
"tags": [
"vdb-entry",
"technical-description"
],
"url": "https://vuldb.com/vuln/385868"
},
{
"name": "VDB-385868 | CTI Indicators (IOB, IOC, IOA)",
"tags": [
"signature",
"permissions-required"
],
"url": "https://vuldb.com/vuln/385868/cti"
},
{
"name": "CVE-2026-18856 | CVE Analysis and Report",
"tags": [
"third-party-advisory"
],
"url": "https://vuldb.com/cve/CVE-2026-18856"
},
{
"name": "Submit #858471 | Poesis Inc. Rhymix CMS <=2.1.33 Server-Side Request Forgery",
"tags": [
"third-party-advisory"
],
"url": "https://vuldb.com/submit/858471"
},
{
"tags": [
"exploit"
],
"url": "https://github.com/MCzhao2006/Rhymix-SSRF-Report"
},
{
"tags": [
"related"
],
"url": "https://rhymix.org/news/1948042"
},
{
"tags": [
"patch"
],
"url": "https://rhymix.org/files/attach/releases/rhymix-2.1.34.zip"
}
],
"timeline": [
{
"lang": "en",
"time": "2026-08-04T00:00:00.000Z",
"value": "Advisory disclosed"
},
{
"lang": "en",
"time": "2026-08-04T02:00:00.000Z",
"value": "VulDB entry created"
},
{
"lang": "en",
"time": "2026-08-04T18:04:30.000Z",
"value": "VulDB entry last update"
}
],
"title": "Poesis Rhymix CMS Data Import importer.admin.controller.php procImporterAdminCheckXmlFile server-side request forgery",
"x_generator": [
"VulDB PVTS v202608"
]
}
},
"cveMetadata": {
"assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"assignerShortName": "VulDB",
"cveId": "CVE-2026-18856",
"datePublished": "2026-08-05T00:30:12.143Z",
"dateReserved": "2026-08-04T15:58:58.811Z",
"dateUpdated": "2026-08-05T00:30:12.143Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}