CVE-2026-40500
ProcessWire CMS SSRF via Add Module From URL
Description
Rejected reason: This CVE ID has been rejected or withdrawn by its CVE Numbering Authority. The "Add Module from URL" feature requires superuser privileges (root-equivalent in ProcessWire) who already has unrestricted arbitrary code execution via standard module upload, making the SSRF vector incapable of providing incremental attack surface. The feature is also disabled by default and requires direct filesystem access to enable.
INFO
Published Date :
April 15, 2026, 10:17 p.m.
Last Modified :
July 9, 2026, 11:17 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | MITRE-CVE | ||||
| CVSS 4.0 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Update ProcessWire CMS to a patched version.
- Restrict access to the 'Add Module From URL' feature.
- Implement network egress filtering.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-40500 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-40500 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Rejected by [email protected]
Jul. 09, 2026
Action Type Old Value New Value -
CVE Modified by [email protected]
Jul. 09, 2026
Action Type Old Value New Value Removed Affected [{'repo': 'https://github.com/processwire/processwire', 'vendor': 'processwire', 'product': 'processwire', 'versions': [{'status': 'affected', 'version': '0', 'versionType': 'semver', 'lessThanOrEqual': '3.0.255'}], 'defaultStatus': 'unknown'}] Removed Tag VulnCheck: disputed Changed Description 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. Rejected reason: This CVE ID has been rejected or withdrawn by its CVE Numbering Authority. The "Add Module from URL" feature requires superuser privileges (root-equivalent in ProcessWire) who already has unrestricted arbitrary code execution via standard module upload, making the SSRF vector incapable of providing incremental attack surface. The feature is also disabled by default and requires direct filesystem access to enable. Removed CVSS V4.0 VulnCheck: AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Removed CVSS V3.1 VulnCheck: AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N Removed CWE VulnCheck: CWE-918 Removed Reference VulnCheck: https://gist.github.com/thepiyushkumarshukla/7514e5eed526fd9d20fcfc42ce8d0a82 Removed Reference VulnCheck: https://processwire.com/ Removed Reference VulnCheck: https://www.vulncheck.com/advisories/processwire-cms-ssrf-via-add-module-from-url -
CVE Modified by [email protected]
Jul. 07, 2026
Action Type Old Value New Value Added Tag disputed -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://github.com/processwire/processwire', 'vendor': 'processwire', 'product': 'processwire', 'versions': [{'status': 'affected', 'version': '0', 'versionType': 'semver', 'lessThanOrEqual': '3.0.255'}], 'defaultStatus': 'unknown'}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-40500', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-04-16T13:38:07.616055Z'} -
New CVE Received by [email protected]
Apr. 15, 2026
Action Type Old Value New Value Added Description 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. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N Added CWE CWE-918 Added Reference https://gist.github.com/thepiyushkumarshukla/7514e5eed526fd9d20fcfc42ce8d0a82 Added Reference https://processwire.com/ Added Reference https://www.vulncheck.com/advisories/processwire-cms-ssrf-via-add-module-from-url