CVE-2026-16268: CWE-918 Server-Side Request Forgery (SSRF) in Newsletters
The Newsletters WordPress plugin before 4.16 does not authenticate or validate a bounce-processing request before fetching a user-supplied URL on the server side, allowing unauthenticated attackers to make the site issue requests to arbitrary internal or external hosts.
AI Analysis
Technical Summary
CVE-2026-16268 is a SSRF vulnerability in the Newsletters WordPress plugin prior to version 4.16. The flaw arises because the plugin processes bounce notifications without authenticating or validating the URL provided by the user. This allows unauthenticated attackers to cause the server to make HTTP requests to arbitrary URLs, potentially accessing internal network resources or external systems.
Potential Impact
An attacker can exploit this vulnerability to make the affected server send requests to arbitrary internal or external hosts. This could lead to information disclosure of internal services or facilitate further attacks depending on the internal network configuration. There is no indication of active exploitation in the wild or direct code execution from this vulnerability.
Mitigation Recommendations
No official patch or remediation guidance is currently available. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is released, users should consider disabling bounce processing or restricting access to the affected functionality to trusted users only.
CVE-2026-16268: CWE-918 Server-Side Request Forgery (SSRF) in Newsletters
Description
The Newsletters WordPress plugin before 4.16 does not authenticate or validate a bounce-processing request before fetching a user-supplied URL on the server side, allowing unauthenticated attackers to make the site issue requests to arbitrary internal or external hosts.
CVSS v3.1
Score 8.2high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-16268 is a SSRF vulnerability in the Newsletters WordPress plugin prior to version 4.16. The flaw arises because the plugin processes bounce notifications without authenticating or validating the URL provided by the user. This allows unauthenticated attackers to cause the server to make HTTP requests to arbitrary URLs, potentially accessing internal network resources or external systems.
Potential Impact
An attacker can exploit this vulnerability to make the affected server send requests to arbitrary internal or external hosts. This could lead to information disclosure of internal services or facilitate further attacks depending on the internal network configuration. There is no indication of active exploitation in the wild or direct code execution from this vulnerability.
Mitigation Recommendations
No official patch or remediation guidance is currently available. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is released, users should consider disabling bounce processing or restricting access to the affected functionality to trusted users only.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WPScan
- Date Reserved
- 2026-07-20T09:09:39.417Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a742933bf8831d53945d739
Added to database: 08/06/2026, 06:26:59 UTC
Last enriched: 08/06/2026, 06:47:18 UTC
Last updated: 08/07/2026, 02:07:01 UTC
Views: 8
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