InstantCMS is a free and open source content management system. A blind Server-Side Request Forgery (SSRF) vulnerability in InstantCMS up to and including 2.17.3 allows authenticated remote attackers to make nay HTTP/HTTPS request via the package parameter. It is possible to make any HTTP/HTTPS request to any website in installer functionality. Due to such vulnerability it is possible to for example scan local network, call local services and its functions, conduct a DoS attack, and/or disclose a server's real IP if it's behind a reverse proxy. It is also possible to exhaust server resources by sending plethora of such requests. As of time of publication, no patched releases are available.
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Solution
No solution given by the vendor.
Workaround
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History
Thu, 11 Sep 2025 19:15:00 +0000
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ssvc
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Thu, 11 Sep 2025 19:00:00 +0000
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Description | InstantCMS is a free and open source content management system. A blind Server-Side Request Forgery (SSRF) vulnerability in InstantCMS up to and including 2.17.3 allows authenticated remote attackers to make nay HTTP/HTTPS request via the package parameter. It is possible to make any HTTP/HTTPS request to any website in installer functionality. Due to such vulnerability it is possible to for example scan local network, call local services and its functions, conduct a DoS attack, and/or disclose a server's real IP if it's behind a reverse proxy. It is also possible to exhaust server resources by sending plethora of such requests. As of time of publication, no patched releases are available. | |
Title | InstantCMS vulnerable to Server-Side Request Forgery via package installer | |
Weaknesses | CWE-918 | |
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Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2025-09-11T19:10:51.221Z
Reserved: 2025-09-08T16:19:26.173Z
Link: CVE-2025-59055

Updated: 2025-09-11T19:06:20.572Z

Status : Received
Published: 2025-09-11T19:15:34.660
Modified: 2025-09-11T19:15:34.660
Link: CVE-2025-59055

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