TI-2017-12471 Aliases CVE-2017-16935 GHSA-4x38-6389-m4h2

Ametys before 4.0.3 requires authentication only for URIs containing a /cms/ substring…

MEDIUM 52CWE-20Published 2017-11-24 · Updated 2024-08-05

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA.

Summary

Ametys before 4.0.3 requires authentication only for URIs containing a /cms/ substring, which allows remote attackers to bypass intended access restrictions via a direct request to /plugins/core-ui/servercomm/messages.xml, as demonstrated by changing the admin password by obtaining account details via a users/search.json request, and then modifying the account via an editUser request.

Why it matters now

EPSS 0.07663 94th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:ametys:ametys::::::::	before 4.0.3	Vulnerable	Ametys

cpe:2.3:a:ametys:ametys:*:*:*:*:*:*:*:* Versions before 4.0.3 Vulnerable ·Ametys

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2017-16935
2026-10-03 Alias added: GHSA-4x38-6389-m4h2

References

Exploit 1

https://blogs.securiteam.com/index.php/archives/3517

Advisory 1

https://issues.ametys.org/browse/RUNTIME-2582

TI-2022-26389 Ametys CMS v4.4.1 - Cross Site Scripting (XSS) CVSS 4.0MEDIUM 5.1
TI-2022-09612 The auto-completion plugin in Ametys CMS before 4.5.0 allows a remote unauthenticated… CVSS 3.1MEDIUM 5.3
TI-2024-20320 An issue in Ametys CMS v4.5.0 and before allows attackers to obtain sensitive information… CVSS 3.1MEDIUM 5.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences