Instantcms: >> Instantcms >> 1.6.0 Security Vulnerabilities
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 Score
4.7
EPSS Score
0.002
Published
2025-09-11
A remote PHP code execution vulnerability exists in InstantCMS version 1.6 and earlier due to unsafe use of eval() within the search view handler. Specifically, user-supplied input passed via the look parameter is concatenated into a PHP expression and executed without proper sanitation. A remote attacker can exploit this flaw by sending a crafted HTTP GET request with a base64-encoded payload in the Cmd header, resulting in arbitrary PHP code execution within the context of the web server.
CVSS Score
9.8
EPSS Score
0.814
Published
2025-08-01
InstantCMS is a free and open source content management system. In photo upload function in the photo album page there is no input validation taking place. Due to this attackers are able to inject the XSS (Cross Site Scripting) payload and execute. This vulnerability is fixed in 2.16.3.
CVSS Score
5.4
EPSS Score
0.002
Published
2024-10-29
InstantCMS is a free and open source content management system. An open redirect was found in the ICMS2 application version 2.16.2 when being redirected after modifying one's own user profile. An attacker could trick a victim into visiting their web application, thinking they are still present on the ICMS2 application. They could then host a website stating "To update your profile, please enter your password," upon which the user may type their password and send it to the attacker. As of time of publication, a patched version is not available.
CVSS Score
3.5
EPSS Score
0.002
Published
2024-04-05
Cross-site Scripting (XSS) - Stored in GitHub repository instantsoft/icms2 prior to 2.16.1.-git.
CVSS Score
3.5
EPSS Score
0.0
Published
2023-09-10
Server-Side Request Forgery (SSRF) in GitHub repository instantsoft/icms2 prior to 2.16.1-git.
CVSS Score
4.3
EPSS Score
0.001
Published
2023-09-10
External Control of System or Configuration Setting in GitHub repository instantsoft/icms2 prior to 2.16.1-git.
CVSS Score
8.8
EPSS Score
0.001
Published
2023-09-01
Cross-site Scripting (XSS) - Stored in GitHub repository instantsoft/icms2 prior to 2.16.1-git.
CVSS Score
6.8
EPSS Score
0.001
Published
2023-08-31
Cross-site Scripting (XSS) - Stored in GitHub repository instantsoft/icms2 prior to 2.16.1-git.
CVSS Score
5.9
EPSS Score
0.001
Published
2023-08-31
Sensitive Cookie in HTTPS Session Without 'Secure' Attribute in GitHub repository instantsoft/icms2 prior to 2.16.1.
CVSS Score
2.6
EPSS Score
0.0
Published
2023-08-31
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