CVE-2017-16935
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…
Does this matter?
A public exploit is published in Exploit-DB and the impact is critical, while EPSS rates exploitation at 7.7%. Anyone can run this; patch or mitigate before the next change window and check exposed instances for signs of use.
Description
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.
- CVSS 3.0
- 9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 7.66% probability · 95th percentile
- Public exploits
- 1 in Exploit-DB · first 7 November 2017
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- ametys/ametys
- Source
- cve@mitre.org
EPSS moved from 5.8% on 21 September 2026 to 7.7% on 27 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- https://blogs.securiteam.com/index.php/archives/3517Exploit, Technical Description, Third Party Advisory
- https://issues.ametys.org/browse/RUNTIME-2582Issue Tracking, Vendor Advisory
- https://blogs.securiteam.com/index.php/archives/3517Exploit, Technical Description, Third Party Advisory
- https://issues.ametys.org/browse/RUNTIME-2582Issue Tracking, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.