CVE-2026-40500
ProcessWire CMS SSRF via Add Module From URL
CVSS Score
6.8
EPSS Score
0.0%
EPSS Percentile
7th
ProcessWire CMS version 3.0.255 and prior contain a server-side request forgery vulnerability in the admin panel's 'Add Module From URL' feature that allows authenticated administrators to supply arbitrary URLs to the module download parameter, causing the server to issue outbound HTTP requests to attacker-controlled internal or external hosts. Attackers can exploit differentiable error messages returned by the server to perform reliable internal network port scanning, host enumeration across RFC-1918 ranges, and potential access to cloud instance metadata endpoints.
| CWE | CWE-918 |
| Vendor | processwire |
| Product | processwire |
| Published | Apr 15, 2026 |
| Last Updated | Apr 16, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
None
Availability
None
Affected Versions
processwire / processwire
0 ≤ 3.0.255
References
Credits
Piyush Kumar Shukla