What’s Vulnerable › Vulnerabilities

CVE-2023-4879: Cross-site Scripting (XSS) - Stored in instantsoft/icms2

• Severity: medium (CVSS 4.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-09-10 · updated 2026-06-17
• Weakness: CWE-79

Description

Cross-site Scripting (XSS) - Stored in GitHub repository instantsoft/icms2 prior to 2.16.1.-git.

Affected products

• InstantCMS: before 2.16.1 — fixed in 2.16.1

How to fix

Upgrade to a fixed version: InstantCMS 2.16.1. Check the vendor advisory for mitigations.

References

• https://github.com/instantsoft/icms2/commit/d0aeeaf5979fbdbf80dc3a3227d6c58442ab7487
• https://huntr.dev/bounties/7df6b167-3c39-4563-9b8a-33613e25cf27
• https://github.com/instantsoft/icms2/commit/d0aeeaf5979fbdbf80dc3a3227d6c58442ab7487
• https://huntr.dev/bounties/7df6b167-3c39-4563-9b8a-33613e25cf27

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