CVE-2026-18856
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.
INFO
Published Date :
Aug. 5, 2026, 1:16 a.m.
Last Modified :
Aug. 5, 2026, 1:16 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-18856
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 2.0 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 4.0 | LOW | [email protected] |
Solution
- Upgrade Poesis Rhymix CMS to version 2.1.34.
- Apply the latest security patches for the Data Import Module.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-18856.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-18856 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-18856
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-18856 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-18856 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by [email protected]
Aug. 05, 2026
Action Type Old Value New Value Added Affected [{'cpes': ['cpe:2.3:a:poesis:rhymix_cms:*:*:*:*:*:*:*:*'], 'vendor': 'Poesis', 'modules': ['Data Import Module'], 'product': 'Rhymix CMS', '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'}]}] Added 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. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L Added CVSS V2 (AV:N/AC:L/Au:M/C:P/I:P/A:P) Added CWE CWE-918 Added Reference https://github.com/MCzhao2006/Rhymix-SSRF-Report Added Reference https://rhymix.org/files/attach/releases/rhymix-2.1.34.zip Added Reference https://rhymix.org/news/1948042 Added Reference https://vuldb.com/cve/CVE-2026-18856 Added Reference https://vuldb.com/submit/858471 Added Reference https://vuldb.com/vuln/385868 Added Reference https://vuldb.com/vuln/385868/cti