CVE-2026-18856: Server-Side Request Forgery in Poesis Rhymix CMS
Poesis Rhymix CMS versions up to 2.1.33 contain a server-side request forgery (SSRF) vulnerability in the Data Import Module's procImporterAdminCheckXmlFile function. This vulnerability allows remote attackers to manipulate the filename argument to cause SSRF. The issue is fixed in version 2.1.34. The CVSS 4.0 base score is 5.1, indicating medium severity.
AI Analysis
Technical Summary
CVE-2026-18856 is a server-side request forgery vulnerability in Poesis Rhymix CMS affecting versions up to 2.1.33. The flaw exists in the procImporterAdminCheckXmlFile function within the Data Import Module, where manipulation of the filename argument enables SSRF attacks. This vulnerability can be exploited remotely without user interaction and requires high privileges. The vendor has fixed the issue in version 2.1.34.
Potential Impact
Successful exploitation allows remote attackers with high privileges to cause server-side request forgery, potentially enabling the attacker to make unauthorized requests from the vulnerable server. The CVSS 4.0 score of 5.1 reflects a medium severity impact with low confidentiality, integrity, and availability impact.
Mitigation Recommendations
Upgrade Poesis Rhymix CMS to version 2.1.34 or later to remediate this vulnerability. No other mitigations are specified. Patch status is confirmed fixed in 2.1.34.
CVE-2026-18856: Server-Side Request Forgery in Poesis Rhymix CMS
Description
Poesis Rhymix CMS versions up to 2.1.33 contain a server-side request forgery (SSRF) vulnerability in the Data Import Module's procImporterAdminCheckXmlFile function. This vulnerability allows remote attackers to manipulate the filename argument to cause SSRF. The issue is fixed in version 2.1.34. The CVSS 4.0 base score is 5.1, indicating medium severity.
CVSS v4.0
Score 5.1medium
Affected software
Poesis
Rhymix CMS
pkg:github/poesis/rhymix_cmscpe:2.3:a:poesis:rhymix_cms:*:*:*:*:*:*:*:*Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-18856 is a server-side request forgery vulnerability in Poesis Rhymix CMS affecting versions up to 2.1.33. The flaw exists in the procImporterAdminCheckXmlFile function within the Data Import Module, where manipulation of the filename argument enables SSRF attacks. This vulnerability can be exploited remotely without user interaction and requires high privileges. The vendor has fixed the issue in version 2.1.34.
Potential Impact
Successful exploitation allows remote attackers with high privileges to cause server-side request forgery, potentially enabling the attacker to make unauthorized requests from the vulnerable server. The CVSS 4.0 score of 5.1 reflects a medium severity impact with low confidentiality, integrity, and availability impact.
Mitigation Recommendations
Upgrade Poesis Rhymix CMS to version 2.1.34 or later to remediate this vulnerability. No other mitigations are specified. Patch status is confirmed fixed in 2.1.34.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-08-04T15:58:58.811Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a728a4cbf8831d539d10fbb
Added to database: 08/05/2026, 00:56:44 UTC
Last enriched: 08/12/2026, 15:26:50 UTC
Last updated: 09/18/2026, 10:01:30 UTC
Views: 99
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