CVE-2026-18856 | BDVDB-2026-355403 Detail

PoesisRhymix CMS

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.

Impact#

Per CVSS v3.1: confidentiality impact low, integrity impact low, availability impact low. Attack vector: network.

Weaknesses#

CWE-918 Server-Side Request Forgery (SSRF)

References#

Exploit#

https://github.com/MCzhao2006/Rhymix-SSRF-Report

History#

Version 12026-08-05Record published in the CVE List.

Published

Published: 2026-08-05
Last modified: 2026-08-05

Vendor information

Vendor: Poesis
Product: Rhymix CMS

All Poesis vulnerabilities

Score

4.7 Medium

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 34.1.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Server-Side Request Forgery

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
2.1.0
Fixed
Not stated
Vulnerable
2.1.1
Fixed
Not stated
Vulnerable
2.1.2
Fixed
Not stated
Vulnerable
2.1.3
Fixed
Not stated
Vulnerable
2.1.4
Fixed
Not stated
Vulnerable
2.1.5
Fixed
Not stated
Vulnerable
2.1.6
Fixed
Not stated
Vulnerable
2.1.7
Fixed
Not stated

Scoring System

CVSS v4.0

5.1 Medium

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

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Attack Requirements	None
Privileges Required	High
User Interaction	None
Vulnerable System Confidentiality	Low
Vulnerable System Integrity	Low
Vulnerable System Availability	Low
Subsequent System Confidentiality	None
Subsequent System Integrity	None
Subsequent System Availability	None

CVSS v3.1

4.7 Medium

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

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	High
User Interaction	None
Scope	Unchanged
Confidentiality	Low
Integrity	Low
Availability	Low

CVSS v3.0

4.7 Medium

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

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	High
User Interaction	None
Scope	Unchanged
Confidentiality	Low
Integrity	Low
Availability	Low

CVSS v2

5.8 Medium

AV:N/AC:L/Au:M/C:P/I:P/A:P/E:POC/RL:OF/RC:C

Metric breakdown
Access Vector	Network
Access Complexity	Low
Authentication	Multiple
Confidentiality Impact	Partial
Integrity Impact	Partial
Availability Impact	Partial

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).