Cross-site Scripting (XSS) - Reflected in instantsoft/icms2
Priority MEDIUM 60CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-79.
Summary
Cross-site Scripting (XSS) - Reflected in GitHub repository instantsoft/icms2 prior to 2.16.1.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00467 40th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed instantsoft/icms2 (instantsoft): 2.16.1
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
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| instantsoft | instantsoft/icms2 | before 2.16.1 | 2.16.1 | Patch available | CNA |
- instantsoft/icms2 Vendorinstantsoft Affected before 2.16.1 Fixed in 2.16.1 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:instantcms:instantcms:*:*:*:*:*:*:*:* | before 2.16.1 | Vulnerable | InstantCMS |
- cpe:2.3:a:instantcms:instantcms:*:*:*:*:*:*:*:* Versions before 2.16.1 Vulnerable ·InstantCMS
Remediation
- Fix · CNA instantsoft/icms2 (instantsoft) Fixed in 2.16.1
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
instantsoft/icms2 2.16.1
4 records Highest priority Priority MEDIUM 4 MEDIUM
Other records, highest priority first
- TI-2023-04287 Server-Side Request Forgery (SSRF) in instantsoft/icms2Priority MEDIUM 58
- TI-2023-04285 Session Fixation in instantsoft/icms2Priority MEDIUM 58
- TI-2023-04290 Sensitive Cookie in HTTPS Session Without 'Secure' Attribute in instantsoft/icms2Priority MEDIUM 50
Timeline
- 2026-10-02 Threatist record created from CVE-2023-4655
- 2026-10-03 Alias added: GHSA-5x3r-fvpc-645c
References
More instantsoft vulnerabilities
- 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-2025-36697 InstantCMS vulnerable to Server-Side Request Forgery via package installer CVSS 3.1HIGH 7.2
- 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
Sources
- CVE-2023-4655 · CVE Program
- CVE-2023-4655 · NVD
- FIRST EPSS
- GHSA-5x3r-fvpc-645c · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences