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Vulnerability record · CVE-2025-59055 · published 11 September 2025

CVE-2025-59055: Instantcms server-side request forgery (ssrf) vulnerability

Instantcms · Instantcms

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.

7.2 CVSS 3.1 High EPSS 0.45% · top 63.1% CWE-918 · Server-side request forgery (SSRF)
7.2CVSS 3.1 base score
0.45%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 1 tagged exploit
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/instantsoft/icms2/commit/fa997bdab3429fad0c850966bfacbcb96d5ab041 Patch
https://github.com/instantsoft/icms2/security/advisories/GHSA-79hh-mhvg-whrw ExploitVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.3CVE-2013-10051Instantcms vulnerabilityA remote PHP code execution vulnerability exists in InstantCMS version 1.6 and earlier due to unsafe use of eval() within the search view handler. Sp…EPSS 2.8%9.1CVE-2023-4188Instantcms sql injection vulnerabilitySQL Injection in GitHub repository instantsoft/icms2 prior to 2.16.1-git.EPSS 0.93%7.2CVE-2024-31212Instantcms improper input validation vulnerabilityInstantCMS is a free and open source content management system. A SQL injection vulnerability affects instantcms v2.16.2 in which an attacker with ad…EPSS 0.85%7.1CVE-2026-28281Instantcms cross-site request forgery vulnerabilityInstantCMS is a free and open source content management system. Prior to 2.18.1, InstantCMS does not validate CSRF tokens, which allows attackers gra…EPSS 0.17%6.1CVE-2023-4655Instantcms cross-site scripting vulnerabilityCross-site Scripting (XSS) - Reflected in GitHub repository instantsoft/icms2 prior to 2.16.1.EPSS 0.47%6.1CVE-2018-14382Instantcms cross-site scripting vulnerabilityInstantCMS 2.10.1 has /redirect?url= XSS.EPSS 0.87%5.4CVE-2024-50348Instantcms cross-site scripting vulnerabilityInstantCMS is a free and open source content management system. In photo upload function in the photo album page there is no input validation taking …EPSS 0.33%5.4CVE-2024-31213Instantcms open redirect vulnerabilityInstantCMS is a free and open source content management system. An open redirect was found in the ICMS2 application version 2.16.2 when being redirec…EPSS 0.40%

Source: NIST National Vulnerability Database (record CVE-2025-59055), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.