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TI-2025-36697 Aliases CVE-2025-59055

InstantCMS vulnerable to Server-Side Request Forgery via package installer

Priority HIGH 65CWE-918Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00454 39th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
instantsofticms2up to 2.17.3—No fix listedCNA
  • icms2 Vendorinstantsoft Affected up to 2.17.3 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:instantcms:instantcms:*:*:*:*:*:*:*:*up to 2.17.3VulnerableInstantCMS
  • cpe:2.3:a:instantcms:instantcms:*:*:*:*:*:*:*:* Versions up to 2.17.3 Vulnerable ·InstantCMS

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-59055

References

Exploit 1

Patch 1

  • TI-2023-03877 SQL Injection in instantsoft/icms2 CVSS 3.1CRITICAL 9.1
  • TI-2024-20589 SQL injection in index_chart_data action CVSS 3.1HIGH 7.2
  • TI-2023-04538 SQL Injection in instantsoft/icms2 CVSS 3.1HIGH 7.2
  • TI-2023-04291 Cross-site Scripting (XSS) - Reflected in instantsoft/icms2 CVSS 3.1MEDIUM 6.1
  • TI-2026-39443 InstantCMS has Remote Code Execution in package installer CVSS 3.1MEDIUM 5.5
  • TI-2024-33783 InstantCMS has a Cross Site Scripting Vulnerability CVSS 3.1MEDIUM 5.4
See all 25 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences