ProcessWire: server-side request forgery vulnerability in the admin panel's 'Add Module From URL' feature
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.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | processwire/processwire | <= 3.0.255 | no fix |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N- Weakness (CWE)
CWE-918- Platform
- Composer
- Package
processwire/processwire- Disclosed
- 16.04.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-gmwr-9j4p-96vm - CC BY 4.0
Vulnerability history: processwire/processwire
All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 6
- First → latest
- 10.2022 04.2026
- Without a fix
- 6
- Exploited in attacks
- 0
Severity breakdown
- High 1
- Medium 4
- Low 1
Disclosures per year
- 2022: 2
- 2023: 0
- 2024: 2
- 2025: 1
- 2026: 1
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ProcessWire: server-side request forgery vulnerability in the admin panel's 'Add Module From URL' feature this entry
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